78152278644344 has 24 divisors (see below), whose sum is σ = 155662302408240. Its totient is φ = 36777542890368.

The previous prime is 78152278644313. The next prime is 78152278644367. The reversal of 78152278644344 is 44344687225187.

It is a super-2 number, since 2×78152278644344² (a number of 29 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 5 ways as a sum of consecutive naturals, for example, 16901442032 + ... + 16901446655.

It is an arithmetic number, because the mean of its divisors is an integer number (6485929267010).

Almost surely, 2^{78152278644344} is an apocalyptic number.

It is an amenable number.

78152278644344 is a deficient number, since it is larger than the sum of its proper divisors (77510023763896).

78152278644344 is a wasteful number, since it uses less digits than its factorization.

78152278644344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33802888727 (or 33802888706 counting only the distinct ones).

The product of its digits is 289013760, while the sum is 65.

The spelling of 78152278644344 in words is "seventy-eight trillion, one hundred fifty-two billion, two hundred seventy-eight million, six hundred forty-four thousand, three hundred forty-four".