31577650849 has 8 divisors (see below), whose sum is σ = 32190844392. Its totient is φ = 30965101440.

The previous prime is 31577650831. The next prime is 31577650873. The reversal of 31577650849 is 94805677513.

It can be written as a sum of positive squares in 4 ways, for example, as 686073249 + 30891577600 = 26193^2 + 175760^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31577650849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31577650849.

It is not an unprimeable number, because it can be changed into a prime (31577650549) 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, 61444 + ... + 258709.

It is an arithmetic number, because the mean of its divisors is an integer number (4023855549).

Almost surely, 2^31577650849 is an apocalyptic number.

It is an amenable number.

31577650849 is a deficient number, since it is larger than the sum of its proper divisors (613193543).

31577650849 is a wasteful number, since it uses less digits than its factorization.

31577650849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322067.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 31577650849 in words is "thirty-one billion, five hundred seventy-seven million, six hundred fifty thousand, eight hundred forty-nine".