155787916 has 24 divisors (see below), whose sum is σ = 291029760. Its totient is φ = 72752400.

The previous prime is 155787911. The next prime is 155787941. The reversal of 155787916 is 619787551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 155787916.

It is not an unprimeable number, because it can be changed into a prime (155787911) 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, 9040 + ... + 19831.

It is an arithmetic number, because the mean of its divisors is an integer number (12126240).

Almost surely, 2^155787916 is an apocalyptic number.

It is an amenable number.

155787916 is a deficient number, since it is larger than the sum of its proper divisors (135241844).

155787916 is a wasteful number, since it uses less digits than its factorization.

155787916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28965 (or 28963 counting only the distinct ones).

The product of its digits is 529200, while the sum is 49.

The square root of 155787916 is about 12481.5029543721. The cubic root of 155787916 is about 538.0771990213.

The spelling of 155787916 in words is "one hundred fifty-five million, seven hundred eighty-seven thousand, nine hundred sixteen".