31377358649 has 8 divisors (see below), whose sum is σ = 38618287680. Its totient is φ = 24826041936.

The previous prime is 31377358637. The next prime is 31377358687. The reversal of 31377358649 is 94685377313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31377358649 - 2⁴ = 31377358633 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31377358594 and 31377358603.

It is not an unprimeable number, because it can be changed into a prime (31377358049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172402979 + ... + 172403160.

It is an arithmetic number, because the mean of its divisors is an integer number (4827285960).

Almost surely, 2^31377358649 is an apocalyptic number.

It is an amenable number.

31377358649 is a deficient number, since it is larger than the sum of its proper divisors (7240929031).

31377358649 is a wasteful number, since it uses less digits than its factorization.

31377358649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344806159.

The product of its digits is 11430720, while the sum is 56.

The spelling of 31377358649 in words is "thirty-one billion, three hundred seventy-seven million, three hundred fifty-eight thousand, six hundred forty-nine".