678400056790 has 32 divisors (see below), whose sum is σ = 1262111503104. Its totient is φ = 262344251520.

The previous prime is 678400056787. The next prime is 678400056797. The reversal of 678400056790 is 97650004876.

It is a happy number.

It is a super-3 number, since 3×678400056790³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678400056797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5781126 + ... + 5897305.

It is an arithmetic number, because the mean of its divisors is an integer number (39440984472).

Almost surely, 2^678400056790 is an apocalyptic number.

678400056790 is a deficient number, since it is larger than the sum of its proper divisors (583711446314).

678400056790 is a wasteful number, since it uses less digits than its factorization.

678400056790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11678632.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 678400056790 in words is "six hundred seventy-eight billion, four hundred million, fifty-six thousand, seven hundred ninety".