155961964 has 6 divisors (see below), whose sum is σ = 272933444. Its totient is φ = 77980980.

The previous prime is 155961947. The next prime is 155962007. The reversal of 155961964 is 469169551.

It is a happy number.

155961964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19495242 + ... + 19495249.

Almost surely, 2^155961964 is an apocalyptic number.

It is an amenable number.

155961964 is a deficient number, since it is larger than the sum of its proper divisors (116971480).

155961964 is a wasteful number, since it uses less digits than its factorization.

155961964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38990495 (or 38990493 counting only the distinct ones).

The product of its digits is 291600, while the sum is 46.

The square root of 155961964 is about 12488.4732453571. The cubic root of 155961964 is about 538.2775063971.

The spelling of 155961964 in words is "one hundred fifty-five million, nine hundred sixty-one thousand, nine hundred sixty-four".