15120434957 has 2 divisors, whose sum is σ = 15120434958. Its totient is φ = 15120434956.

The previous prime is 15120434887. The next prime is 15120435007. The reversal of 15120434957 is 75943402151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13553383561 + 1567051396 = 116419^2 + 39586^2 .

It is an emirp because it is prime and its reverse (75943402151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15120434957 - 2⁸ = 15120434701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15120434257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560217478 + 7560217479.

It is an arithmetic number, because the mean of its divisors is an integer number (7560217479).

Almost surely, 2^15120434957 is an apocalyptic number.

It is an amenable number.

15120434957 is a deficient number, since it is larger than the sum of its proper divisors (1).

15120434957 is an equidigital number, since it uses as much as digits as its factorization.

15120434957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 15120434957 in words is "fifteen billion, one hundred twenty million, four hundred thirty-four thousand, nine hundred fifty-seven".