78000057031 has 12 divisors (see below), whose sum is σ = 87374074680. Its totient is φ = 69517287840.

The previous prime is 78000057011. The next prime is 78000057041. The reversal of 78000057031 is 13075000087.

It is not a de Polignac number, because 78000057031 - 2¹¹ = 78000054983 is a prime.

It is a super-2 number, since 2×78000057031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78000056984 and 78000057002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78000057011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7952665 + ... + 7962466.

It is an arithmetic number, because the mean of its divisors is an integer number (7281172890).

Almost surely, 2^78000057031 is an apocalyptic number.

78000057031 is a deficient number, since it is larger than the sum of its proper divisors (9374017649).

78000057031 is a wasteful number, since it uses less digits than its factorization.

78000057031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15915186 (or 15915173 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The spelling of 78000057031 in words is "seventy-eight billion, fifty-seven thousand, thirty-one".