155949572113 has 4 divisors (see below), whose sum is σ = 155950368768. Its totient is φ = 155948775460.

The previous prime is 155949572111. The next prime is 155949572147. The reversal of 155949572113 is 311275949551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 155949572113 - 2¹ = 155949572111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155949572111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121008 + ... + 571438.

It is an arithmetic number, because the mean of its divisors is an integer number (38987592192).

Almost surely, 2^155949572113 is an apocalyptic number.

It is an amenable number.

155949572113 is a deficient number, since it is larger than the sum of its proper divisors (796655).

155949572113 is an equidigital number, since it uses as much as digits as its factorization.

155949572113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796654.

The product of its digits is 1701000, while the sum is 52.

The spelling of 155949572113 in words is "one hundred fifty-five billion, nine hundred forty-nine million, five hundred seventy-two thousand, one hundred thirteen".