78357677772 has 48 divisors (see below), whose sum is σ = 200978515584. Its totient is φ = 23563488000.

The previous prime is 78357677743. The next prime is 78357677777. The reversal of 78357677772 is 27777675387.

It is a super-3 number, since 3×78357677772³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (78357677777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2248429 + ... + 2283012.

It is an arithmetic number, because the mean of its divisors is an integer number (4187052408).

Almost surely, 2^78357677772 is an apocalyptic number.

It is an amenable number.

78357677772 is an abundant number, since it is smaller than the sum of its proper divisors (122620837812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78357677772 is a wasteful number, since it uses less digits than its factorization.

78357677772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531590 (or 4531588 counting only the distinct ones).

The product of its digits is 169414560, while the sum is 66.

The spelling of 78357677772 in words is "seventy-eight billion, three hundred fifty-seven million, six hundred seventy-seven thousand, seven hundred seventy-two".