77242942080 has 96 divisors (see below), whose sum is σ = 266729554260. Its totient is φ = 20598116352.

The previous prime is 77242942061. The next prime is 77242942097. The reversal of 77242942080 is 8024924277.

It can be written as a sum of positive squares in 2 ways, for example, as 65049482304 + 12193459776 = 255048^2 + 110424^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 6699357 + ... + 6710876.

Almost surely, 2^77242942080 is an apocalyptic number.

It is an amenable number.

77242942080 is an abundant number, since it is smaller than the sum of its proper divisors (189486612180).

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

77242942080 is a wasteful number, since it uses less digits than its factorization.

77242942080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13410258 (or 13410243 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 77242942080 in words is "seventy-seven billion, two hundred forty-two million, nine hundred forty-two thousand, eighty".