155810509478464 has 63 divisors (see below), whose sum is σ = 309741722920827. Its totient is φ = 77765601558528.

The previous prime is 155810509478411. The next prime is 155810509478471. The reversal of 155810509478464 is 464874905018551.

The square root of 155810509478464 is 12482408.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 47786914444864 + 108023595033600 = 6912808^2 + 10393440^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155810509478464.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76791773002 + ... + 76791775030.

Almost surely, 2^{155810509478464} is an apocalyptic number.

155810509478464 is the 12482408-th square number.

It is an amenable number.

155810509478464 is a deficient number, since it is larger than the sum of its proper divisors (153931213442363).

155810509478464 is an frugal number, since it uses more digits than its factorization.

155810509478464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608 (or 2800 counting only the distinct ones).

The product of its (nonzero) digits is 193536000, while the sum is 67.

The spelling of 155810509478464 in words is "one hundred fifty-five trillion, eight hundred ten billion, five hundred nine million, four hundred seventy-eight thousand, four hundred sixty-four".