77244120090 has 48 divisors (see below), whose sum is σ = 212648523048. Its totient is φ = 19386759168.

The previous prime is 77244120053. The next prime is 77244120131. The reversal of 77244120090 is 9002144277.

77244120090 is a `hidden beast` number, since 7 + 7 + 2 + 441 + 200 + 9 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 72558580689 + 4685539401 = 269367^2 + 68451^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25241647 + ... + 25244706.

Almost surely, 2^77244120090 is an apocalyptic number.

77244120090 is an abundant number, since it is smaller than the sum of its proper divisors (135404402958).

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

77244120090 is a wasteful number, since it uses less digits than its factorization.

77244120090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50486383 (or 50486380 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 77244120090 in words is "seventy-seven billion, two hundred forty-four million, one hundred twenty thousand, ninety".