77748593035638 has 64 divisors (see below), whose sum is σ = 187067642941440. Its totient is φ = 21044354068512.

The previous prime is 77748593035637. The next prime is 77748593035699. The reversal of 77748593035638 is 83653039584777.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77748593035638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77748593035637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45108495 + ... + 46800357.

It is an arithmetic number, because the mean of its divisors is an integer number (2922931920960).

Almost surely, 2^{77748593035638} is an apocalyptic number.

77748593035638 is an abundant number, since it is smaller than the sum of its proper divisors (109319049905802).

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

77748593035638 is a wasteful number, since it uses less digits than its factorization.

77748593035638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749481.

The product of its (nonzero) digits is 3200601600, while the sum is 75.

The spelling of 77748593035638 in words is "seventy-seven trillion, seven hundred forty-eight billion, five hundred ninety-three million, thirty-five thousand, six hundred thirty-eight".