155320668646 has 32 divisors (see below), whose sum is σ = 288117849600. Its totient is φ = 61739534880.

The previous prime is 155320668637. The next prime is 155320668653. The reversal of 155320668646 is 646866023551.

It is a junction number, because it is equal to n+sod(n) for n = 155320668593 and 155320668602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14286126 + ... + 14296993.

It is an arithmetic number, because the mean of its divisors is an integer number (9003682800).

Almost surely, 2^155320668646 is an apocalyptic number.

155320668646 is a deficient number, since it is larger than the sum of its proper divisors (132797180954).

155320668646 is a wasteful number, since it uses less digits than its factorization.

155320668646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28583164.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 155320668646 in words is "one hundred fifty-five billion, three hundred twenty million, six hundred sixty-eight thousand, six hundred forty-six".