10125715391 has 16 divisors (see below), whose sum is σ = 11875023360. Its totient is φ = 8535156480.

The previous prime is 10125715361. The next prime is 10125715433. The reversal of 10125715391 is 19351752101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10125715391 is a prime.

It is a super-2 number, since 2×10125715391² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10125715361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505586 + ... + 525231.

It is an arithmetic number, because the mean of its divisors is an integer number (742188960).

Almost surely, 2^10125715391 is an apocalyptic number.

10125715391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10125715391 is a deficient number, since it is larger than the sum of its proper divisors (1749307969).

10125715391 is a wasteful number, since it uses less digits than its factorization.

10125715391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030894.

The product of its (nonzero) digits is 9450, while the sum is 35.

The spelling of 10125715391 in words is "ten billion, one hundred twenty-five million, seven hundred fifteen thousand, three hundred ninety-one".