15930471257 has 2 divisors, whose sum is σ = 15930471258. Its totient is φ = 15930471256.

The previous prime is 15930471229. The next prime is 15930471307. The reversal of 15930471257 is 75217403951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10462016656 + 5468454601 = 102284^2 + 73949^2 .

It is a cyclic number.

It is not a de Polignac number, because 15930471257 - 2¹⁴ = 15930454873 is a prime.

It is not a weakly prime, because it can be changed into another prime (15930471857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7965235628 + 7965235629.

It is an arithmetic number, because the mean of its divisors is an integer number (7965235629).

Almost surely, 2^15930471257 is an apocalyptic number.

It is an amenable number.

15930471257 is a deficient number, since it is larger than the sum of its proper divisors (1).

15930471257 is an equidigital number, since it uses as much as digits as its factorization.

15930471257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 15930471257 in words is "fifteen billion, nine hundred thirty million, four hundred seventy-one thousand, two hundred fifty-seven".