15457717997 has 8 divisors (see below), whose sum is σ = 15546231360. Its totient is φ = 15369348960.

The previous prime is 15457717981. The next prime is 15457718009. The reversal of 15457717997 is 79971775451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15457717997 - 2⁴ = 15457717981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15457717967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182504 + ... + 253422.

It is an arithmetic number, because the mean of its divisors is an integer number (1943278920).

Almost surely, 2^15457717997 is an apocalyptic number.

It is an amenable number.

15457717997 is a deficient number, since it is larger than the sum of its proper divisors (88513363).

15457717997 is a wasteful number, since it uses less digits than its factorization.

15457717997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72163.

The product of its digits is 19448100, while the sum is 62.

The spelling of 15457717997 in words is "fifteen billion, four hundred fifty-seven million, seven hundred seventeen thousand, nine hundred ninety-seven".