15540534425 has 96 divisors (see below), whose sum is σ = 21914430720. Its totient is φ = 10921996800.

The previous prime is 15540534421. The next prime is 15540534463. The reversal of 15540534425 is 52443504551.

It is not a de Polignac number, because 15540534425 - 2² = 15540534421 is a prime.

It is a super-2 number, since 2×15540534425² (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 (15540534421) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 150878924 + ... + 150879026.

It is an arithmetic number, because the mean of its divisors is an integer number (228275320).

Almost surely, 2^15540534425 is an apocalyptic number.

It is an amenable number.

15540534425 is a deficient number, since it is larger than the sum of its proper divisors (6373896295).

15540534425 is a wasteful number, since it uses less digits than its factorization.

15540534425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 15540534425 in words is "fifteen billion, five hundred forty million, five hundred thirty-four thousand, four hundred twenty-five".