961661481 has 8 divisors (see below), whose sum is σ = 1398780384. Its totient is φ = 582825120.

The previous prime is 961661479. The next prime is 961661483. The reversal of 961661481 is 184166169.

It is an interprime number because it is at equal distance from previous prime (961661479) and next prime (961661483).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 961661481 - 2¹ = 961661479 is a prime.

It is a super-2 number, since 2×961661481² = 1849585608078226722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (961661483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14570596 + ... + 14570661.

It is an arithmetic number, because the mean of its divisors is an integer number (174847548).

Almost surely, 2^961661481 is an apocalyptic number.

It is an amenable number.

961661481 is a deficient number, since it is larger than the sum of its proper divisors (437118903).

961661481 is a wasteful number, since it uses less digits than its factorization.

961661481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29141271.

The product of its digits is 62208, while the sum is 42.

The square root of 961661481 is about 31010.6672130736. The cubic root of 961661481 is about 987.0536079094.

The spelling of 961661481 in words is "nine hundred sixty-one million, six hundred sixty-one thousand, four hundred eighty-one".