78156953365 has 12 divisors (see below), whose sum is σ = 99629834436. Its totient is φ = 58847587328.

The previous prime is 78156953323. The next prime is 78156953389. The reversal of 78156953365 is 56335965187.

It can be written as a sum of positive squares in 6 ways, for example, as 18953304241 + 59203649124 = 137671^2 + 243318^2 .

It is not a de Polignac number, because 78156953365 - 2²³ = 78148564757 is a prime.

It is a super-2 number, since 2×78156953365² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27042484 + ... + 27045373.

It is an arithmetic number, because the mean of its divisors is an integer number (8302486203).

Almost surely, 2^78156953365 is an apocalyptic number.

It is an amenable number.

78156953365 is a deficient number, since it is larger than the sum of its proper divisors (21472881071).

78156953365 is a wasteful number, since it uses less digits than its factorization.

78156953365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54087896 (or 54087879 counting only the distinct ones).

The product of its digits is 20412000, while the sum is 58.

The spelling of 78156953365 in words is "seventy-eight billion, one hundred fifty-six million, nine hundred fifty-three thousand, three hundred sixty-five".