15120977401 has 4 divisors (see below), whose sum is σ = 15187008100. Its totient is φ = 15054946704.

The previous prime is 15120977393. The next prime is 15120977429. The reversal of 15120977401 is 10477902151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13817767401 + 1303210000 = 117549^2 + 36100^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120977401 - 2³ = 15120977393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15120977441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33015006 + ... + 33015463.

It is an arithmetic number, because the mean of its divisors is an integer number (3796752025).

Almost surely, 2^15120977401 is an apocalyptic number.

It is an amenable number.

15120977401 is a deficient number, since it is larger than the sum of its proper divisors (66030699).

15120977401 is an equidigital number, since it uses as much as digits as its factorization.

15120977401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66030698.

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 15120977401 in words is "fifteen billion, one hundred twenty million, nine hundred seventy-seven thousand, four hundred one".