78632055261 has 32 divisors (see below), whose sum is σ = 117476480000. Its totient is φ = 51979811184.

The previous prime is 78632055167. The next prime is 78632055277. The reversal of 78632055261 is 16255023687.

78632055261 is a `hidden beast` number, since 7 + 8 + 6 + 32 + 0 + 552 + 61 = 666.

It is not a de Polignac number, because 78632055261 - 2¹⁵ = 78632022493 is a prime.

It is a super-2 number, since 2×78632055261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78612055261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1911690 + ... + 1952388.

It is an arithmetic number, because the mean of its divisors is an integer number (3671140000).

Almost surely, 2^78632055261 is an apocalyptic number.

It is an amenable number.

78632055261 is a deficient number, since it is larger than the sum of its proper divisors (38844424739).

78632055261 is a wasteful number, since it uses less digits than its factorization.

78632055261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41310 (or 41304 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 78632055261 in words is "seventy-eight billion, six hundred thirty-two million, fifty-five thousand, two hundred sixty-one".