78379761705 has 64 divisors (see below), whose sum is σ = 147237447168. Its totient is φ = 34857123840.

The previous prime is 78379761703. The next prime is 78379761781. The reversal of 78379761705 is 50716797387.

It is not a de Polignac number, because 78379761705 - 2¹ = 78379761703 is a prime.

It is a super-2 number, since 2×78379761705² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78379761703) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1493877 + ... + 1545453.

It is an arithmetic number, because the mean of its divisors is an integer number (2300585112).

Almost surely, 2^78379761705 is an apocalyptic number.

It is an amenable number.

78379761705 is a deficient number, since it is larger than the sum of its proper divisors (68857685463).

78379761705 is a wasteful number, since it uses less digits than its factorization.

78379761705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51986.

The product of its (nonzero) digits is 15558480, while the sum is 60.

The spelling of 78379761705 in words is "seventy-eight billion, three hundred seventy-nine million, seven hundred sixty-one thousand, seven hundred five".