156742506694978 has 8 divisors (see below), whose sum is σ = 235364681880972. Its totient is φ = 78287612734656.

The previous prime is 156742506694909. The next prime is 156742506695003. The reversal of 156742506694978 is 879496605247651.

156742506694978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 140106117509449 + 16636389185529 = 11836643^2 + 4078773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 156742506694898 and 156742506694907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41820304075 + ... + 41820307822.

Almost surely, 2^{156742506694978} is an apocalyptic number.

156742506694978 is a deficient number, since it is larger than the sum of its proper divisors (78622175185994).

156742506694978 is an equidigital number, since it uses as much as digits as its factorization.

156742506694978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83640612836.

The product of its (nonzero) digits is 5486745600, while the sum is 79.

The spelling of 156742506694978 in words is "one hundred fifty-six trillion, seven hundred forty-two billion, five hundred six million, six hundred ninety-four thousand, nine hundred seventy-eight".