394267542156 has 36 divisors (see below), whose sum is σ = 1020928558104. Its totient is φ = 128217086400.

The previous prime is 394267542139. The next prime is 394267542199. The reversal of 394267542156 is 651245762493.

It is a happy number.

394267542156 is a `hidden beast` number, since 3 + 9 + 42 + 6 + 7 + 542 + 1 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133557990 + ... + 133560941.

It is an arithmetic number, because the mean of its divisors is an integer number (28359126614).

Almost surely, 2^394267542156 is an apocalyptic number.

394267542156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

394267542156 is an abundant number, since it is smaller than the sum of its proper divisors (626661015948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394267542156 is a wasteful number, since it uses less digits than its factorization.

394267542156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267118982 (or 267118977 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 394267542156 in words is "three hundred ninety-four billion, two hundred sixty-seven million, five hundred forty-two thousand, one hundred fifty-six".