155991416 has 24 divisors (see below), whose sum is σ = 334467720. Its totient is φ = 66813408.

The previous prime is 155991397. The next prime is 155991431. The reversal of 155991416 is 614199551.

155991416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92630 + ... + 94298.

It is an arithmetic number, because the mean of its divisors is an integer number (13936155).

Almost surely, 2^155991416 is an apocalyptic number.

It is an amenable number.

155991416 is an abundant number, since it is smaller than the sum of its proper divisors (178476304).

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

155991416 is an frugal number, since it uses more digits than its factorization.

155991416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351 (or 1678 counting only the distinct ones).

The product of its digits is 48600, while the sum is 41.

The square root of 155991416 is about 12489.6523570514. The cubic root of 155991416 is about 538.3113872035.

The spelling of 155991416 in words is "one hundred fifty-five million, nine hundred ninety-one thousand, four hundred sixteen".