155320764 has 12 divisors (see below), whose sum is σ = 362415144. Its totient is φ = 51773584.

The previous prime is 155320747. The next prime is 155320799. The reversal of 155320764 is 467023551.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6471687 + ... + 6471710.

It is an arithmetic number, because the mean of its divisors is an integer number (30201262).

Almost surely, 2^155320764 is an apocalyptic number.

It is an amenable number.

155320764 is an abundant number, since it is smaller than the sum of its proper divisors (207094380).

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

155320764 is a wasteful number, since it uses less digits than its factorization.

155320764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12943404 (or 12943402 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 155320764 is about 12462.7751323692. The cubic root of 155320764 is about 537.5388271213.

The spelling of 155320764 in words is "one hundred fifty-five million, three hundred twenty thousand, seven hundred sixty-four".