7490779872421 has 16 divisors (see below), whose sum is σ = 7731848635200. Its totient is φ = 7253526284928.

The previous prime is 7490779872383. The next prime is 7490779872439. The reversal of 7490779872421 is 1242789770947.

It is a cyclic number.

It is not a de Polignac number, because 7490779872421 - 2¹⁹ = 7490779348133 is a prime.

It is a super-2 number, since 2×7490779872421² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7490779872481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100009041 + ... + 100083913.

It is an arithmetic number, because the mean of its divisors is an integer number (483240539700).

Almost surely, 2^{7490779872421} is an apocalyptic number.

It is an amenable number.

7490779872421 is a deficient number, since it is larger than the sum of its proper divisors (241068762779).

7490779872421 is a wasteful number, since it uses less digits than its factorization.

7490779872421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100308.

The product of its (nonzero) digits is 99574272, while the sum is 67.

The spelling of 7490779872421 in words is "seven trillion, four hundred ninety billion, seven hundred seventy-nine million, eight hundred seventy-two thousand, four hundred twenty-one".