7421713525818 has 64 divisors (see below), whose sum is σ = 16603749792000. Its totient is φ = 2457257954112.

The previous prime is 7421713525817. The next prime is 7421713525819. The reversal of 7421713525818 is 8185253171247.

7421713525818 is a `hidden beast` number, since 7 + 4 + 2 + 1 + 7 + 1 + 3 + 52 + 581 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (7421713525817) and next prime (7421713525819).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7421713525817) 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, 23488203 + ... + 23802081.

It is an arithmetic number, because the mean of its divisors is an integer number (259433590500).

Almost surely, 2^{7421713525818} is an apocalyptic number.

7421713525818 is an abundant number, since it is smaller than the sum of its proper divisors (9182036266182).

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

7421713525818 is a wasteful number, since it uses less digits than its factorization.

7421713525818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316836 (or 316830 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 54.

The spelling of 7421713525818 in words is "seven trillion, four hundred twenty-one billion, seven hundred thirteen million, five hundred twenty-five thousand, eight hundred eighteen".