15447135990 has 64 divisors (see below), whose sum is σ = 43554454272. Its totient is φ = 3456700800.

The previous prime is 15447135989. The next prime is 15447136009. The reversal of 15447135990 is 9953174451.

It is a super-2 number, since 2×15447135990² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1796076 + ... + 1804655.

It is an arithmetic number, because the mean of its divisors is an integer number (680538348).

Almost surely, 2^15447135990 is an apocalyptic number.

15447135990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15447135990 is an abundant number, since it is smaller than the sum of its proper divisors (28107318282).

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

15447135990 is a wasteful number, since it uses less digits than its factorization.

15447135990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600765.

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 15447135990 in words is "fifteen billion, four hundred forty-seven million, one hundred thirty-five thousand, nine hundred ninety".