15135425540 has 48 divisors (see below), whose sum is σ = 33181021440. Its totient is φ = 5788379520.

The previous prime is 15135425453. The next prime is 15135425549. The reversal of 15135425540 is 4552453151.

It is a super-2 number, since 2×15135425540² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15135425540.

It is not an unprimeable number, because it can be changed into a prime (15135425549) 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, 1277966 + ... + 1289754.

It is an arithmetic number, because the mean of its divisors is an integer number (691271280).

Almost surely, 2^15135425540 is an apocalyptic number.

15135425540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15135425540 is an abundant number, since it is smaller than the sum of its proper divisors (18045595900).

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

15135425540 is a wasteful number, since it uses less digits than its factorization.

15135425540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14612 (or 14610 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 15135425540 its reverse (4552453151), we get a palindrome (19687878691).

The spelling of 15135425540 in words is "fifteen billion, one hundred thirty-five million, four hundred twenty-five thousand, five hundred forty".