155578916 has 12 divisors (see below), whose sum is σ = 286592880. Its totient is φ = 73695240.

The previous prime is 155578901. The next prime is 155578919. The reversal of 155578916 is 619875551.

It is not an unprimeable number, because it can be changed into a prime (155578919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1023470 + ... + 1023621.

It is an arithmetic number, because the mean of its divisors is an integer number (23882740).

Almost surely, 2^155578916 is an apocalyptic number.

It is an amenable number.

155578916 is a deficient number, since it is larger than the sum of its proper divisors (131013964).

155578916 is a wasteful number, since it uses less digits than its factorization.

155578916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047114 (or 2047112 counting only the distinct ones).

The product of its digits is 378000, while the sum is 47.

The square root of 155578916 is about 12473.1277552986. The cubic root of 155578916 is about 537.8364690489.

The spelling of 155578916 in words is "one hundred fifty-five million, five hundred seventy-eight thousand, nine hundred sixteen".