15136511640 has 64 divisors (see below), whose sum is σ = 45578440800. Its totient is φ = 4021389312.

The previous prime is 15136511617. The next prime is 15136511641. The reversal of 15136511640 is 4611563151.

It is a super-2 number, since 2×15136511640² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15136511641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202177 + ... + 266736.

Almost surely, 2^15136511640 is an apocalyptic number.

15136511640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15136511640 is an abundant number, since it is smaller than the sum of its proper divisors (30441929160).

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

15136511640 is a wasteful number, since it uses less digits than its factorization.

15136511640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469196 (or 469192 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 15136511640 in words is "fifteen billion, one hundred thirty-six million, five hundred eleven thousand, six hundred forty".