78353271215 has 16 divisors (see below), whose sum is σ = 94432685760. Its totient is φ = 62410444800.

The previous prime is 78353271209. The next prime is 78353271229. The reversal of 78353271215 is 51217235387.

It is not a de Polignac number, because 78353271215 - 2¹² = 78353267119 is a prime.

It is a super-2 number, since 2×78353271215² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1931390 + ... + 1971540.

It is an arithmetic number, because the mean of its divisors is an integer number (5902042860).

Almost surely, 2^78353271215 is an apocalyptic number.

78353271215 is a deficient number, since it is larger than the sum of its proper divisors (16079414545).

78353271215 is a wasteful number, since it uses less digits than its factorization.

78353271215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41842.

The product of its digits is 352800, while the sum is 44.

The spelling of 78353271215 in words is "seventy-eight billion, three hundred fifty-three million, two hundred seventy-one thousand, two hundred fifteen".