31445660409 has 4 divisors (see below), whose sum is σ = 41927547216. Its totient is φ = 20963773604.

The previous prime is 31445660401. The next prime is 31445660483. The reversal of 31445660409 is 90406654413.

It is a happy number.

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: 90406654413 = 3 ⋅30135551471.

It is a cyclic number.

It is not a de Polignac number, because 31445660409 - 2³ = 31445660401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31445660401) 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, 5240943399 + ... + 5240943404.

It is an arithmetic number, because the mean of its divisors is an integer number (10481886804).

Almost surely, 2^31445660409 is an apocalyptic number.

It is an amenable number.

31445660409 is a deficient number, since it is larger than the sum of its proper divisors (10481886807).

31445660409 is a wasteful number, since it uses less digits than its factorization.

31445660409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10481886806.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 31445660409 in words is "thirty-one billion, four hundred forty-five million, six hundred sixty thousand, four hundred nine".