15725001913 has 2 divisors, whose sum is σ = 15725001914. Its totient is φ = 15725001912.

The previous prime is 15725001889. The next prime is 15725001947. The reversal of 15725001913 is 31910052751.

It is an a-pointer prime, because the next prime (15725001947) can be obtained adding 15725001913 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13505461369 + 2219540544 = 116213^2 + 47112^2 .

It is a cyclic number.

It is not a de Polignac number, because 15725001913 - 2¹³ = 15724993721 is a prime.

It is not a weakly prime, because it can be changed into another prime (15725007913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7862500956 + 7862500957.

It is an arithmetic number, because the mean of its divisors is an integer number (7862500957).

Almost surely, 2^15725001913 is an apocalyptic number.

It is an amenable number.

15725001913 is a deficient number, since it is larger than the sum of its proper divisors (1).

15725001913 is an equidigital number, since it uses as much as digits as its factorization.

15725001913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 34.

The spelling of 15725001913 in words is "fifteen billion, seven hundred twenty-five million, one thousand, nine hundred thirteen".