155947816 has 16 divisors (see below), whose sum is σ = 292536000. Its totient is φ = 77938224.

The previous prime is 155947811. The next prime is 155947823. The reversal of 155947816 is 618749551.

It is not an unprimeable number, because it can be changed into a prime (155947811) 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, 28035 + ... + 33133.

It is an arithmetic number, because the mean of its divisors is an integer number (18283500).

Almost surely, 2^155947816 is an apocalyptic number.

It is an amenable number.

155947816 is a deficient number, since it is larger than the sum of its proper divisors (136588184).

155947816 is a wasteful number, since it uses less digits than its factorization.

155947816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928 (or 8924 counting only the distinct ones).

The product of its digits is 302400, while the sum is 46.

The square root of 155947816 is about 12487.9067901710. The cubic root of 155947816 is about 538.2612293933.

The spelling of 155947816 in words is "one hundred fifty-five million, nine hundred forty-seven thousand, eight hundred sixteen".