79370665985 has 32 divisors (see below), whose sum is σ = 108976039200. Its totient is φ = 54975909888.

The previous prime is 79370665973. The next prime is 79370665991. The reversal of 79370665985 is 58956607397.

It is a Cunningham number, because it is equal to 281728²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 20458153024 + 58912512961 = 143032^2 + 242719^2 .

It is a cyclic number.

It is not a de Polignac number, because 79370665985 - 2¹⁸ = 79370403841 is a prime.

It is a super-3 number, since 3×79370665985³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201191 + ... + 446339.

It is an arithmetic number, because the mean of its divisors is an integer number (3405501225).

Almost surely, 2^79370665985 is an apocalyptic number.

It is an amenable number.

79370665985 is a deficient number, since it is larger than the sum of its proper divisors (29605373215).

79370665985 is a wasteful number, since it uses less digits than its factorization.

79370665985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245477.

The product of its (nonzero) digits is 85730400, while the sum is 65.

The spelling of 79370665985 in words is "seventy-nine billion, three hundred seventy million, six hundred sixty-five thousand, nine hundred eighty-five".