156668915438 has 16 divisors (see below), whose sum is σ = 268749381120. Its totient is φ = 67100296536.

The previous prime is 156668915437. The next prime is 156668915441. The reversal of 156668915438 is 834519866651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156668915437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3604658 + ... + 3647861.

It is an arithmetic number, because the mean of its divisors is an integer number (16796836320).

Almost surely, 2^156668915438 is an apocalyptic number.

156668915438 is a deficient number, since it is larger than the sum of its proper divisors (112080465682).

156668915438 is a wasteful number, since it uses less digits than its factorization.

156668915438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7254071.

The product of its digits is 37324800, while the sum is 62.

The spelling of 156668915438 in words is "one hundred fifty-six billion, six hundred sixty-eight million, nine hundred fifteen thousand, four hundred thirty-eight".