156664451678 has 32 divisors (see below), whose sum is σ = 271138731264. Its totient is φ = 66499417152.

The previous prime is 156664451611. The next prime is 156664451681. The reversal of 156664451678 is 876154466651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8863826 + ... + 8881482.

It is an arithmetic number, because the mean of its divisors is an integer number (8473085352).

Almost surely, 2^156664451678 is an apocalyptic number.

156664451678 is a deficient number, since it is larger than the sum of its proper divisors (114474279586).

156664451678 is a wasteful number, since it uses less digits than its factorization.

156664451678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23696.

The product of its digits is 29030400, while the sum is 59.

The spelling of 156664451678 in words is "one hundred fifty-six billion, six hundred sixty-four million, four hundred fifty-one thousand, six hundred seventy-eight".