79416081257 has 4 divisors (see below), whose sum is σ = 79417123200. Its totient is φ = 79415039316.

The previous prime is 79416081223. The next prime is 79416081287. The reversal of 79416081257 is 75218061497.

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.

It is a cyclic number.

It is not a de Polignac number, because 79416081257 - 2¹² = 79416077161 is a prime.

It is a super-3 number, since 3×79416081257³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79416081287) 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, 396773 + ... + 562370.

It is an arithmetic number, because the mean of its divisors is an integer number (19854280800).

Almost surely, 2^79416081257 is an apocalyptic number.

It is an amenable number.

79416081257 is a deficient number, since it is larger than the sum of its proper divisors (1041943).

79416081257 is an equidigital number, since it uses as much as digits as its factorization.

79416081257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041942.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 79416081257 in words is "seventy-nine billion, four hundred sixteen million, eighty-one thousand, two hundred fifty-seven".