78245408211115 has 32 divisors (see below), whose sum is σ = 99732564836352. Its totient is φ = 58834578528000.

The previous prime is 78245408211049. The next prime is 78245408211119. The reversal of 78245408211115 is 51111280454287.

It is not a de Polignac number, because 78245408211115 - 2²⁹ = 78244871340203 is a prime.

It is a super-2 number, since 2×78245408211115² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78245408211119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26189151 + ... + 29023480.

It is an arithmetic number, because the mean of its divisors is an integer number (3116642651136).

Almost surely, 2^{78245408211115} is an apocalyptic number.

78245408211115 is a deficient number, since it is larger than the sum of its proper divisors (21487156625237).

78245408211115 is a wasteful number, since it uses less digits than its factorization.

78245408211115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55212931.

The product of its (nonzero) digits is 716800, while the sum is 49.

The spelling of 78245408211115 in words is "seventy-eight trillion, two hundred forty-five billion, four hundred eight million, two hundred eleven thousand, one hundred fifteen".