309996672641 has 2 divisors, whose sum is σ = 309996672642. Its totient is φ = 309996672640.

The previous prime is 309996672547. The next prime is 309996672659. The reversal of 309996672641 is 146276699903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302586906241 + 7409766400 = 550079^2 + 86080^2 .

It is a cyclic number.

It is not a de Polignac number, because 309996672641 - 2¹⁰ = 309996671617 is a prime.

It is not a weakly prime, because it can be changed into another prime (309996672941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154998336320 + 154998336321.

It is an arithmetic number, because the mean of its divisors is an integer number (154998336321).

Almost surely, 2^309996672641 is an apocalyptic number.

It is an amenable number.

309996672641 is a deficient number, since it is larger than the sum of its proper divisors (1).

309996672641 is an equidigital number, since it uses as much as digits as its factorization.

309996672641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26453952, while the sum is 62.

The spelling of 309996672641 in words is "three hundred nine billion, nine hundred ninety-six million, six hundred seventy-two thousand, six hundred forty-one".