31377358641 has 4 divisors (see below), whose sum is σ = 41836478192. Its totient is φ = 20918239092.

The previous prime is 31377358637. The next prime is 31377358687. The reversal of 31377358641 is 14685377313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14685377313 = 3 ⋅4895125771.

It is not a de Polignac number, because 31377358641 - 2² = 31377358637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31377358741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5229559771 + ... + 5229559776.

It is an arithmetic number, because the mean of its divisors is an integer number (10459119548).

Almost surely, 2^31377358641 is an apocalyptic number.

It is an amenable number.

31377358641 is a deficient number, since it is larger than the sum of its proper divisors (10459119551).

31377358641 is a wasteful number, since it uses less digits than its factorization.

31377358641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10459119550.

The product of its digits is 1270080, while the sum is 48.

The spelling of 31377358641 in words is "thirty-one billion, three hundred seventy-seven million, three hundred fifty-eight thousand, six hundred forty-one".