156681010678 has 4 divisors (see below), whose sum is σ = 235021516020. Its totient is φ = 78340505338.

The previous prime is 156681010631. The next prime is 156681010679. The reversal of 156681010678 is 876010186651.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156681010679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39170252668 + ... + 39170252671.

It is an arithmetic number, because the mean of its divisors is an integer number (58755379005).

Almost surely, 2^156681010678 is an apocalyptic number.

156681010678 is a deficient number, since it is larger than the sum of its proper divisors (78340505342).

156681010678 is an equidigital number, since it uses as much as digits as its factorization.

156681010678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78340505341.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 156681010678 in words is "one hundred fifty-six billion, six hundred eighty-one million, ten thousand, six hundred seventy-eight".