15146439621 has 32 divisors (see below), whose sum is σ = 21162835968. Its totient is φ = 9626506560.

The previous prime is 15146439617. The next prime is 15146439641. The reversal of 15146439621 is 12693464151.

It is a happy number.

15146439621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15146439621 - 2² = 15146439617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15146439641) 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 31 ways as a sum of consecutive naturals, for example, 1415136 + ... + 1425798.

It is an arithmetic number, because the mean of its divisors is an integer number (661338624).

Almost surely, 2^15146439621 is an apocalyptic number.

It is an amenable number.

15146439621 is a deficient number, since it is larger than the sum of its proper divisors (6016396347).

15146439621 is a wasteful number, since it uses less digits than its factorization.

15146439621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10961.

The product of its digits is 155520, while the sum is 42.

The spelling of 15146439621 in words is "fifteen billion, one hundred forty-six million, four hundred thirty-nine thousand, six hundred twenty-one".