155129393768 has 32 divisors (see below), whose sum is σ = 291195220320. Its totient is φ = 77477400000.

The previous prime is 155129393747. The next prime is 155129393821. The reversal of 155129393768 is 867393921551.

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, 51519383 + ... + 51522393.

It is an arithmetic number, because the mean of its divisors is an integer number (9099850635).

Almost surely, 2^155129393768 is an apocalyptic number.

It is an amenable number.

155129393768 is a deficient number, since it is larger than the sum of its proper divisors (136065826552).

155129393768 is a wasteful number, since it uses less digits than its factorization.

155129393768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8129 (or 8125 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 59.

The spelling of 155129393768 in words is "one hundred fifty-five billion, one hundred twenty-nine million, three hundred ninety-three thousand, seven hundred sixty-eight".