75781052500780 has 96 divisors (see below), whose sum is σ = 177060557862720. Its totient is φ = 27009685447680.

The previous prime is 75781052500759. The next prime is 75781052500781. The reversal of 75781052500780 is 8700525018757.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (75781052500781) 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, 8365626 + ... + 14884414.

It is an arithmetic number, because the mean of its divisors is an integer number (1844380811070).

Almost surely, 2^{75781052500780} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75781052500780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88530278931360).

75781052500780 is an abundant number, since it is smaller than the sum of its proper divisors (101279505361940).

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

75781052500780 is a wasteful number, since it uses less digits than its factorization.

75781052500780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6519859 (or 6519857 counting only the distinct ones).

The product of its (nonzero) digits is 5488000, while the sum is 55.

The spelling of 75781052500780 in words is "seventy-five trillion, seven hundred eighty-one billion, fifty-two million, five hundred thousand, seven hundred eighty".