77738505088040 has 16 divisors (see below), whose sum is σ = 174911636448180. Its totient is φ = 31095402035200.

The previous prime is 77738505088037. The next prime is 77738505088081. The reversal of 77738505088040 is 4088050583777.

It can be written as a sum of positive squares in 2 ways, for example, as 77497351414564 + 241153673476 = 8803258^2 + 491074^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971731313561 + ... + 971731313640.

Almost surely, 2^{77738505088040} is an apocalyptic number.

It is an amenable number.

77738505088040 is an abundant number, since it is smaller than the sum of its proper divisors (97173131360140).

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

77738505088040 is a wasteful number, since it uses less digits than its factorization.

77738505088040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943462627212 (or 1943462627208 counting only the distinct ones).

The product of its (nonzero) digits is 52684800, while the sum is 62.

The spelling of 77738505088040 in words is "seventy-seven trillion, seven hundred thirty-eight billion, five hundred five million, eighty-eight thousand, forty".