78252381780 has 48 divisors (see below), whose sum is σ = 226174631424. Its totient is φ = 20194162560.

The previous prime is 78252381719. The next prime is 78252381869. The reversal of 78252381780 is 8718325287.

It is a super-2 number, since 2×78252381780² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21033727 + ... + 21037446.

It is an arithmetic number, because the mean of its divisors is an integer number (4711971488).

Almost surely, 2^78252381780 is an apocalyptic number.

It is an amenable number.

78252381780 is an abundant number, since it is smaller than the sum of its proper divisors (147922249644).

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

78252381780 is a wasteful number, since it uses less digits than its factorization.

78252381780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42071216 (or 42071214 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 51.

The spelling of 78252381780 in words is "seventy-eight billion, two hundred fifty-two million, three hundred eighty-one thousand, seven hundred eighty".