15677897593 has 4 divisors (see below), whose sum is σ = 15697229968. Its totient is φ = 15658565220.

The previous prime is 15677897579. The next prime is 15677897603. The reversal of 15677897593 is 39579877651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39579877651 = 37 ⋅1069726423.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15677897593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15677997593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9664971 + ... + 9666592.

It is an arithmetic number, because the mean of its divisors is an integer number (3924307492).

Almost surely, 2^15677897593 is an apocalyptic number.

It is an amenable number.

15677897593 is a deficient number, since it is larger than the sum of its proper divisors (19332375).

15677897593 is an equidigital number, since it uses as much as digits as its factorization.

15677897593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19332374.

The product of its digits is 100018800, while the sum is 67.

The spelling of 15677897593 in words is "fifteen billion, six hundred seventy-seven million, eight hundred ninety-seven thousand, five hundred ninety-three".