31577638007 has 2 divisors, whose sum is σ = 31577638008. Its totient is φ = 31577638006.

The previous prime is 31577637997. The next prime is 31577638061. The reversal of 31577638007 is 70083677513.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (70083677513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31577638007 - 2¹⁰ = 31577636983 is a prime.

It is a super-2 number, since 2×31577638007² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31577638207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15788819003 + 15788819004.

It is an arithmetic number, because the mean of its divisors is an integer number (15788819004).

Almost surely, 2^31577638007 is an apocalyptic number.

31577638007 is a deficient number, since it is larger than the sum of its proper divisors (1).

31577638007 is an equidigital number, since it uses as much as digits as its factorization.

31577638007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 740880, while the sum is 47.

The spelling of 31577638007 in words is "thirty-one billion, five hundred seventy-seven million, six hundred thirty-eight thousand, seven".