961515380 has 24 divisors (see below), whose sum is σ = 2307637248. Its totient is φ = 329662368.

The previous prime is 961515377. The next prime is 961515383. The reversal of 961515380 is 83515169.

It is an interprime number because it is at equal distance from previous prime (961515377) and next prime (961515383).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961515383) 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, 3433844 + ... + 3434123.

It is an arithmetic number, because the mean of its divisors is an integer number (96151552).

Almost surely, 2^961515380 is an apocalyptic number.

It is an amenable number.

961515380 is an abundant number, since it is smaller than the sum of its proper divisors (1346121868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

961515380 is a wasteful number, since it uses less digits than its factorization.

961515380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867983 (or 6867981 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 961515380 is about 31008.3114664440. The cubic root of 961515380 is about 987.0036191397.

The spelling of 961515380 in words is "nine hundred sixty-one million, five hundred fifteen thousand, three hundred eighty".