81763807750 has 96 divisors (see below), whose sum is σ = 165359581920. Its totient is φ = 30258368000.

The previous prime is 81763807721. The next prime is 81763807813. The reversal of 81763807750 is 5770836718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4253160 + ... + 4272340.

It is an arithmetic number, because the mean of its divisors is an integer number (1722495645).

Almost surely, 2^81763807750 is an apocalyptic number.

81763807750 is an abundant number, since it is smaller than the sum of its proper divisors (83595774170).

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

81763807750 is a wasteful number, since it uses less digits than its factorization.

81763807750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19291 (or 19264 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 81763807750 in words is "eighty-one billion, seven hundred sixty-three million, eight hundred seven thousand, seven hundred fifty".