15501204157 has 2 divisors, whose sum is σ = 15501204158. Its totient is φ = 15501204156.

The previous prime is 15501204113. The next prime is 15501204181. The reversal of 15501204157 is 75140210551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14730919641 + 770284516 = 121371^2 + 27754^2 .

It is a cyclic number.

It is not a de Polignac number, because 15501204157 - 2¹¹ = 15501202109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15501204457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7750602078 + 7750602079.

It is an arithmetic number, because the mean of its divisors is an integer number (7750602079).

Almost surely, 2^15501204157 is an apocalyptic number.

It is an amenable number.

15501204157 is a deficient number, since it is larger than the sum of its proper divisors (1).

15501204157 is an equidigital number, since it uses as much as digits as its factorization.

15501204157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 31.

The spelling of 15501204157 in words is "fifteen billion, five hundred one million, two hundred four thousand, one hundred fifty-seven".