77182479648 has 72 divisors (see below), whose sum is σ = 226567950336. Its totient is φ = 24897571200.

The previous prime is 77182479629. The next prime is 77182479691. The reversal of 77182479648 is 84697428177.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×77182479648² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4313568 + ... + 4331423.

It is an arithmetic number, because the mean of its divisors is an integer number (3146777088).

Almost surely, 2^77182479648 is an apocalyptic number.

It is an amenable number.

77182479648 is an abundant number, since it is smaller than the sum of its proper divisors (149385470688).

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

77182479648 is a wasteful number, since it uses less digits than its factorization.

77182479648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645038 (or 8645027 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 63.

The spelling of 77182479648 in words is "seventy-seven billion, one hundred eighty-two million, four hundred seventy-nine thousand, six hundred forty-eight".