678698123090 has 64 divisors (see below), whose sum is σ = 1325594350080. Its totient is φ = 248699669760.

The previous prime is 678698123087. The next prime is 678698123137. The reversal of 678698123090 is 90321896876.

It is a super-2 number, since 2×678698123090² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63980567 + ... + 63991173.

It is an arithmetic number, because the mean of its divisors is an integer number (20712411720).

Almost surely, 2^678698123090 is an apocalyptic number.

678698123090 is a deficient number, since it is larger than the sum of its proper divisors (646896226990).

678698123090 is a wasteful number, since it uses less digits than its factorization.

678698123090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14307.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 678698123090 in words is "six hundred seventy-eight billion, six hundred ninety-eight million, one hundred twenty-three thousand, ninety".