155602200020 has 12 divisors (see below), whose sum is σ = 326764620084. Its totient is φ = 62240880000.

The previous prime is 155602199993. The next prime is 155602200043. The reversal of 155602200020 is 20002206551.

It can be written as a sum of positive squares in 2 ways, for example, as 80790103696 + 74812096324 = 284236^2 + 273518^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3890054981 + ... + 3890055020.

It is an arithmetic number, because the mean of its divisors is an integer number (27230385007).

Almost surely, 2^155602200020 is an apocalyptic number.

155602200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155602200020 is an abundant number, since it is smaller than the sum of its proper divisors (171162420064).

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

155602200020 is a wasteful number, since it uses less digits than its factorization.

155602200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780110010 (or 7780110008 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 155602200020 its reverse (20002206551), we get a palindrome (175604406571).

The spelling of 155602200020 in words is "one hundred fifty-five billion, six hundred two million, two hundred thousand, twenty".