155379238729 has 16 divisors (see below), whose sum is σ = 183936924864. Its totient is φ = 129392827200.

The previous prime is 155379238687. The next prime is 155379238741. The reversal of 155379238729 is 927832973551.

It is a de Polignac number, because none of the positive numbers 2^k-155379238729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155379238229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4128474 + ... + 4165939.

It is an arithmetic number, because the mean of its divisors is an integer number (11496057804).

Almost surely, 2^155379238729 is an apocalyptic number.

It is an amenable number.

155379238729 is a deficient number, since it is larger than the sum of its proper divisors (28557686135).

155379238729 is a wasteful number, since it uses less digits than its factorization.

155379238729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8294568.

The product of its digits is 28576800, while the sum is 61.

The spelling of 155379238729 in words is "one hundred fifty-five billion, three hundred seventy-nine million, two hundred thirty-eight thousand, seven hundred twenty-nine".