15550795512 has 384 divisors, whose sum is σ = 52457932800. Its totient is φ = 4064062464.

The previous prime is 15550795511. The next prime is 15550795517. The reversal of 15550795512 is 21559705551.

15550795512 is a `hidden beast` number, since 1 + 5 + 5 + 507 + 95 + 51 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15550795511) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 56139918 + ... + 56140194.

It is an arithmetic number, because the mean of its divisors is an integer number (136609200).

Almost surely, 2^15550795512 is an apocalyptic number.

15550795512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15550795512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26228966400).

15550795512 is an abundant number, since it is smaller than the sum of its proper divisors (36907137288).

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

15550795512 is a wasteful number, since it uses less digits than its factorization.

15550795512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 393750, while the sum is 45.

The spelling of 15550795512 in words is "fifteen billion, five hundred fifty million, seven hundred ninety-five thousand, five hundred twelve".