31945154009 has 8 divisors (see below), whose sum is σ = 33033411840. Its totient is φ = 30860506800.

The previous prime is 31945153979. The next prime is 31945154029. The reversal of 31945154009 is 90045154913.

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-31945154009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31945154029) 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, 884654 + ... + 920055.

It is an arithmetic number, because the mean of its divisors is an integer number (4129176480).

Almost surely, 2^31945154009 is an apocalyptic number.

It is an amenable number.

31945154009 is a deficient number, since it is larger than the sum of its proper divisors (1088257831).

31945154009 is a wasteful number, since it uses less digits than its factorization.

31945154009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805311.

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 31945154009 in words is "thirty-one billion, nine hundred forty-five million, one hundred fifty-four thousand, nine".