74700636643 has 2 divisors, whose sum is σ = 74700636644. Its totient is φ = 74700636642.

The previous prime is 74700636631. The next prime is 74700636671. The reversal of 74700636643 is 34663600747.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74700636643 - 2²⁵ = 74667082211 is a prime.

It is a super-2 number, since 2×74700636643² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74700636593 and 74700636602.

It is not a weakly prime, because it can be changed into another prime (74700636613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37350318321 + 37350318322.

It is an arithmetic number, because the mean of its divisors is an integer number (37350318322).

Almost surely, 2^74700636643 is an apocalyptic number.

74700636643 is a deficient number, since it is larger than the sum of its proper divisors (1).

74700636643 is an equidigital number, since it uses as much as digits as its factorization.

74700636643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 46.

The spelling of 74700636643 in words is "seventy-four billion, seven hundred million, six hundred thirty-six thousand, six hundred forty-three".