78257882834 has 16 divisors (see below), whose sum is σ = 119415378816. Its totient is φ = 38455467600.

The previous prime is 78257882827. The next prime is 78257882851. The reversal of 78257882834 is 43828875287.

It is a super-2 number, since 2×78257882834² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619757 + ... + 735264.

It is an arithmetic number, because the mean of its divisors is an integer number (7463461176).

Almost surely, 2^78257882834 is an apocalyptic number.

78257882834 is a deficient number, since it is larger than the sum of its proper divisors (41157495982).

78257882834 is a wasteful number, since it uses less digits than its factorization.

78257882834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355521.

The product of its digits is 48168960, while the sum is 62.

The spelling of 78257882834 in words is "seventy-eight billion, two hundred fifty-seven million, eight hundred eighty-two thousand, eight hundred thirty-four".