79152598649 has 4 divisors (see below), whose sum is σ = 80041953780. Its totient is φ = 78263243520.

The previous prime is 79152598639. The next prime is 79152598663. The reversal of 79152598649 is 94689525197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94689525197 = 27449 ⋅3449653.

It can be written as a sum of positive squares in 2 ways, for example, as 17670916624 + 61481682025 = 132932^2 + 247955^2 .

It is a cyclic number.

It is not a de Polignac number, because 79152598649 - 2¹² = 79152594553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79152598639) 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, 444677432 + ... + 444677609.

It is an arithmetic number, because the mean of its divisors is an integer number (20010488445).

Almost surely, 2^79152598649 is an apocalyptic number.

It is an amenable number.

79152598649 is a deficient number, since it is larger than the sum of its proper divisors (889355131).

79152598649 is an equidigital number, since it uses as much as digits as its factorization.

79152598649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889355130.

The product of its digits is 48988800, while the sum is 65.

The spelling of 79152598649 in words is "seventy-nine billion, one hundred fifty-two million, five hundred ninety-eight thousand, six hundred forty-nine".