79961246377 has 4 divisors (see below), whose sum is σ = 80125438336. Its totient is φ = 79797054420.

The previous prime is 79961246363. The next prime is 79961246401. The reversal of 79961246377 is 77364216997.

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 79961246377 - 2¹¹ = 79961244329 is a prime.

It is a super-2 number, since 2×79961246377² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79961246077) 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 3 ways as a sum of consecutive naturals, for example, 82095249 + ... + 82096222.

It is an arithmetic number, because the mean of its divisors is an integer number (20031359584).

Almost surely, 2^79961246377 is an apocalyptic number.

It is an amenable number.

79961246377 is a deficient number, since it is larger than the sum of its proper divisors (164191959).

79961246377 is a wasteful number, since it uses less digits than its factorization.

79961246377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164191958.

The product of its digits is 24004512, while the sum is 61.

The spelling of 79961246377 in words is "seventy-nine billion, nine hundred sixty-one million, two hundred forty-six thousand, three hundred seventy-seven".