77772005572 has 12 divisors (see below), whose sum is σ = 136103102380. Its totient is φ = 38885404896.

The previous prime is 77772005533. The next prime is 77772005579. The reversal of 77772005572 is 27550027777.

It can be written as a sum of positive squares in 2 ways, for example, as 25835418756 + 51936586816 = 160734^2 + 227896^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77772005579) 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, 280858 + ... + 484174.

Almost surely, 2^77772005572 is an apocalyptic number.

It is an amenable number.

77772005572 is a deficient number, since it is larger than the sum of its proper divisors (58331096808).

77772005572 is a wasteful number, since it uses less digits than its factorization.

77772005572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298950 (or 298948 counting only the distinct ones).

The product of its (nonzero) digits is 1680700, while the sum is 49.

The spelling of 77772005572 in words is "seventy-seven billion, seven hundred seventy-two million, five thousand, five hundred seventy-two".