155562612642 has 80 divisors (see below), whose sum is σ = 364430975040. Its totient is φ = 49504216608.

The previous prime is 155562612617. The next prime is 155562612643. The reversal of 155562612642 is 246216265551.

155562612642 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 626 + 12 + 6 + 4 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (155562612643) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1908784 + ... + 1988612.

It is an arithmetic number, because the mean of its divisors is an integer number (4555387188).

Almost surely, 2^155562612642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155562612642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182215487520).

155562612642 is an abundant number, since it is smaller than the sum of its proper divisors (208868362398).

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

155562612642 is a wasteful number, since it uses less digits than its factorization.

155562612642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80389 (or 80380 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 155562612642 in words is "one hundred fifty-five billion, five hundred sixty-two million, six hundred twelve thousand, six hundred forty-two".