31677577409 has 2 divisors, whose sum is σ = 31677577410. Its totient is φ = 31677577408.

The previous prime is 31677577403. The next prime is 31677577433. The reversal of 31677577409 is 90477577613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23563171009 + 8114406400 = 153503^2 + 90080^2 .

It is a cyclic number.

It is not a de Polignac number, because 31677577409 - 2¹² = 31677573313 is a prime.

It is not a weakly prime, because it can be changed into another prime (31677577403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15838788704 + 15838788705.

It is an arithmetic number, because the mean of its divisors is an integer number (15838788705).

Almost surely, 2^31677577409 is an apocalyptic number.

It is an amenable number.

31677577409 is a deficient number, since it is larger than the sum of its proper divisors (1).

31677577409 is an equidigital number, since it uses as much as digits as its factorization.

31677577409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7779240, while the sum is 56.

The spelling of 31677577409 in words is "thirty-one billion, six hundred seventy-seven million, five hundred seventy-seven thousand, four hundred nine".