78155571838096 has 15 divisors (see below), whose sum is σ = 151426488950713. Its totient is φ = 39077768237920.

The previous prime is 78155571838093. The next prime is 78155571838249. The reversal of 78155571838096 is 69083817555187.

The square root of 78155571838096 is 8840564.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 56186477943696 + 21969093894400 = 7495764^2 + 4687120^2 .

It is a super-2 number, since 2×78155571838096² (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 (78155571838093) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 34257186 + ... + 36467326.

Almost surely, 2^{78155571838096} is an apocalyptic number.

78155571838096 is the 8840564-th square number.

It is an amenable number.

78155571838096 is a deficient number, since it is larger than the sum of its proper divisors (73270917112617).

78155571838096 is an frugal number, since it uses more digits than its factorization.

78155571838096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4420290 (or 2210143 counting only the distinct ones).

The product of its (nonzero) digits is 508032000, while the sum is 73.

The spelling of 78155571838096 in words is "seventy-eight trillion, one hundred fifty-five billion, five hundred seventy-one million, eight hundred thirty-eight thousand, ninety-six".