155620213892 has 36 divisors (see below), whose sum is σ = 321704416656. Its totient is φ = 65295191520.

The previous prime is 155620213891. The next prime is 155620213901. The reversal of 155620213892 is 298312026551.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (155620213891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10456538 + ... + 10471409.

It is an arithmetic number, because the mean of its divisors is an integer number (8936233796).

Almost surely, 2^155620213892 is an apocalyptic number.

It is an amenable number.

155620213892 is an abundant number, since it is smaller than the sum of its proper divisors (166084202764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155620213892 is a wasteful number, since it uses less digits than its factorization.

155620213892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20927988 (or 20927973 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 155620213892 in words is "one hundred fifty-five billion, six hundred twenty million, two hundred thirteen thousand, eight hundred ninety-two".