261916070 has 16 divisors (see below), whose sum is σ = 507714480. Its totient is φ = 96707424.

The previous prime is 261916051. The next prime is 261916073. The reversal of 261916070 is 70619162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261916073) 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, 1007240 + ... + 1007499.

It is an arithmetic number, because the mean of its divisors is an integer number (31732155).

Almost surely, 2^261916070 is an apocalyptic number.

261916070 is a deficient number, since it is larger than the sum of its proper divisors (245798410).

261916070 is a wasteful number, since it uses less digits than its factorization.

261916070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014759.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 261916070 is about 16183.8212422159. The cubic root of 261916070 is about 639.8144563050.

The spelling of 261916070 in words is "two hundred sixty-one million, nine hundred sixteen thousand, seventy".