15057012640 has 24 divisors (see below), whose sum is σ = 35572192740. Its totient is φ = 6022804992.

The previous prime is 15057012563. The next prime is 15057012673. The reversal of 15057012640 is 4621075051.

15057012640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14110588944 + 946423696 = 118788^2 + 30764^2 .

It is a super-2 number, since 2×15057012640² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47053005 + ... + 47053324.

Almost surely, 2^15057012640 is an apocalyptic number.

15057012640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15057012640 is an abundant number, since it is smaller than the sum of its proper divisors (20515180100).

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

15057012640 is an equidigital number, since it uses as much as digits as its factorization.

15057012640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94106344 (or 94106336 counting only the distinct ones).

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

Adding to 15057012640 its reverse (4621075051), we get a palindrome (19678087691).

The spelling of 15057012640 in words is "fifteen billion, fifty-seven million, twelve thousand, six hundred forty".