15135540540 has 48 divisors (see below), whose sum is σ = 44222105088. Its totient is φ = 3860659264.

The previous prime is 15135540527. The next prime is 15135540577. The reversal of 15135540540 is 4504553151.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5482512 + ... + 5485271.

It is an arithmetic number, because the mean of its divisors is an integer number (921293856).

Almost surely, 2^15135540540 is an apocalyptic number.

15135540540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15135540540 is an abundant number, since it is smaller than the sum of its proper divisors (29086564548).

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

15135540540 is a wasteful number, since it uses less digits than its factorization.

15135540540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10967818 (or 10967816 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

It can be divided in two parts, 15 and 135540540, that multiplied together give a square (2033108100 = 45090²).

The spelling of 15135540540 in words is "fifteen billion, one hundred thirty-five million, five hundred forty thousand, five hundred forty".