74700636631 has 2 divisors, whose sum is σ = 74700636632. Its totient is φ = 74700636630.

The previous prime is 74700636617. The next prime is 74700636643. The reversal of 74700636631 is 13663600747.

It is a strong prime.

It is an emirp because it is prime and its reverse (13663600747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74700636631 - 2⁵ = 74700636599 is a prime.

It is a super-2 number, since 2×74700636631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74700636671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37350318315 + 37350318316.

It is an arithmetic number, because the mean of its divisors is an integer number (37350318316).

Almost surely, 2^74700636631 is an apocalyptic number.

74700636631 is a deficient number, since it is larger than the sum of its proper divisors (1).

74700636631 is an equidigital number, since it uses as much as digits as its factorization.

74700636631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 43.

The spelling of 74700636631 in words is "seventy-four billion, seven hundred million, six hundred thirty-six thousand, six hundred thirty-one".