15615164542 has 4 divisors (see below), whose sum is σ = 23422746816. Its totient is φ = 7807582270.

The previous prime is 15615164533. The next prime is 15615164549. The reversal of 15615164542 is 24546151651.

15615164542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24546151651 = 7 ⋅3506593093.

It is a junction number, because it is equal to n+sod(n) for n = 15615164495 and 15615164504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15615164549) 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 as a sum of consecutive naturals, namely, 3903791134 + ... + 3903791137.

It is an arithmetic number, because the mean of its divisors is an integer number (5855686704).

Almost surely, 2^15615164542 is an apocalyptic number.

15615164542 is a deficient number, since it is larger than the sum of its proper divisors (7807582274).

15615164542 is an equidigital number, since it uses as much as digits as its factorization.

15615164542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7807582273.

The product of its digits is 144000, while the sum is 40.

The spelling of 15615164542 in words is "fifteen billion, six hundred fifteen million, one hundred sixty-four thousand, five hundred forty-two".