77838870382516 has 12 divisors (see below), whose sum is σ = 137859204172032. Its totient is φ = 38450526333368.

The previous prime is 77838870382513. The next prime is 77838870382541. The reversal of 77838870382516 is 61528307883877.

It is a happy number.

It is a super-2 number, since 2×77838870382516² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77838870382513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117227214100 + ... + 117227214763.

It is an arithmetic number, because the mean of its divisors is an integer number (11488267014336).

Almost surely, 2^{77838870382516} is an apocalyptic number.

It is an amenable number.

77838870382516 is a deficient number, since it is larger than the sum of its proper divisors (60020333789516).

77838870382516 is a wasteful number, since it uses less digits than its factorization.

77838870382516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234454428950 (or 234454428948 counting only the distinct ones).

The product of its (nonzero) digits is 758661120, while the sum is 73.

The spelling of 77838870382516 in words is "seventy-seven trillion, eight hundred thirty-eight billion, eight hundred seventy million, three hundred eighty-two thousand, five hundred sixteen".