155209193044 has 24 divisors (see below), whose sum is σ = 287609833728. Its totient is φ = 73035473280.

The previous prime is 155209193039. The next prime is 155209193071. The reversal of 155209193044 is 440391902551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375279 + ... + 1483849.

It is an arithmetic number, because the mean of its divisors is an integer number (11983743072).

Almost surely, 2^155209193044 is an apocalyptic number.

It is an amenable number.

155209193044 is a deficient number, since it is larger than the sum of its proper divisors (132400640684).

155209193044 is a wasteful number, since it uses less digits than its factorization.

155209193044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129615 (or 129613 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 155209193044 in words is "one hundred fifty-five billion, two hundred nine million, one hundred ninety-three thousand, forty-four".