15121478040 has 64 divisors (see below), whose sum is σ = 46419436800. Its totient is φ = 3938616192.

The previous prime is 15121477999. The next prime is 15121478117. The reversal of 15121478040 is 4087412151.

15121478040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15121478040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15121477992 and 15121478010.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1460100 + ... + 1470419.

It is an arithmetic number, because the mean of its divisors is an integer number (725303700).

Almost surely, 2^15121478040 is an apocalyptic number.

15121478040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15121478040 is an abundant number, since it is smaller than the sum of its proper divisors (31297958760).

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

15121478040 is a wasteful number, since it uses less digits than its factorization.

15121478040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930576 (or 2930572 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The spelling of 15121478040 in words is "fifteen billion, one hundred twenty-one million, four hundred seventy-eight thousand, forty".