155622071200 has 72 divisors (see below), whose sum is σ = 381264933420. Its totient is φ = 62027212800.

The previous prime is 155622071197. The next prime is 155622071249. The reversal of 155622071200 is 2170226551.

It can be written as a sum of positive squares in 6 ways, for example, as 79386443536 + 76235627664 = 281756^2 + 276108^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121335 + ... + 570934.

Almost surely, 2^155622071200 is an apocalyptic number.

155622071200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155622071200 is an abundant number, since it is smaller than the sum of its proper divisors (225642862220).

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

155622071200 is a wasteful number, since it uses less digits than its factorization.

155622071200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692570 (or 692557 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 155622071200 its reverse (2170226551), we get a palindrome (157792297751).

The spelling of 155622071200 in words is "one hundred fifty-five billion, six hundred twenty-two million, seventy-one thousand, two hundred".