155634120100 has 18 divisors (see below), whose sum is σ = 337726040834. Its totient is φ = 62253648000.

The previous prime is 155634120091. The next prime is 155634120119. The reversal of 155634120100 is 1021436551.

It can be written as a sum of positive squares in 3 ways, for example, as 45670254436 + 109963865664 = 213706^2 + 331608^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 778170501 + ... + 778170700.

Almost surely, 2^155634120100 is an apocalyptic number.

155634120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155634120100 is an abundant number, since it is smaller than the sum of its proper divisors (182091920734).

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

155634120100 is a wasteful number, since it uses less digits than its factorization.

155634120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556341215 (or 1556341208 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 155634120100 its reverse (1021436551), we get a palindrome (156655556651).

The spelling of 155634120100 in words is "one hundred fifty-five billion, six hundred thirty-four million, one hundred twenty thousand, one hundred".