7778125542072 has 64 divisors (see below), whose sum is σ = 19466853120000. Its totient is φ = 2589837244544.

The previous prime is 7778125542071. The next prime is 7778125542119. The reversal of 7778125542072 is 2702455218777.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7778125542071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294623929 + ... + 294650327.

It is an arithmetic number, because the mean of its divisors is an integer number (304169580000).

Almost surely, 2^{7778125542072} is an apocalyptic number.

It is an amenable number.

7778125542072 is an abundant number, since it is smaller than the sum of its proper divisors (11688727577928).

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

7778125542072 is a wasteful number, since it uses less digits than its factorization.

7778125542072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39540 (or 39536 counting only the distinct ones).

The product of its (nonzero) digits is 15366400, while the sum is 57.

The spelling of 7778125542072 in words is "seven trillion, seven hundred seventy-eight billion, one hundred twenty-five million, five hundred forty-two thousand, seventy-two".