78216115156466 has 32 divisors (see below), whose sum is σ = 141142517765760. Its totient is φ = 31756771374336.

The previous prime is 78216115156453. The next prime is 78216115156519. The reversal of 78216115156466 is 66465151161287.

It is a happy number.

It is a super-2 number, since 2×78216115156466² (a number of 29 digits) contains 22 as substring.

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, 70642106 + ... + 71740778.

It is an arithmetic number, because the mean of its divisors is an integer number (4410703680180).

Almost surely, 2^{78216115156466} is an apocalyptic number.

78216115156466 is a deficient number, since it is larger than the sum of its proper divisors (62926402609294).

78216115156466 is a wasteful number, since it uses less digits than its factorization.

78216115156466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366338.

The product of its digits is 14515200, while the sum is 59.

The spelling of 78216115156466 in words is "seventy-eight trillion, two hundred sixteen billion, one hundred fifteen million, one hundred fifty-six thousand, four hundred sixty-six".