15615620142 has 16 divisors (see below), whose sum is σ = 32238700032. Its totient is φ = 5037296760.

The previous prime is 15615620131. The next prime is 15615620143. The reversal of 15615620142 is 24102651651.

15615620142 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 2×15615620142² (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 (15615620143) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 41977288 + ... + 41977659.

It is an arithmetic number, because the mean of its divisors is an integer number (2014918752).

Almost surely, 2^15615620142 is an apocalyptic number.

15615620142 is an abundant number, since it is smaller than the sum of its proper divisors (16623079890).

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

15615620142 is a wasteful number, since it uses less digits than its factorization.

15615620142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83954983.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 15615620142 in words is "fifteen billion, six hundred fifteen million, six hundred twenty thousand, one hundred forty-two".