31945156406 has 8 divisors (see below), whose sum is σ = 47918886984. Its totient is φ = 15972194080.

The previous prime is 31945156403. The next prime is 31945156469. The reversal of 31945156406 is 60465154913.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31945156403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73460 + ... + 263223.

It is an arithmetic number, because the mean of its divisors is an integer number (5989860873).

Almost surely, 2^31945156406 is an apocalyptic number.

31945156406 is a deficient number, since it is larger than the sum of its proper divisors (15973730578).

31945156406 is a wasteful number, since it uses less digits than its factorization.

31945156406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384126.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 31945156406 in words is "thirty-one billion, nine hundred forty-five million, one hundred fifty-six thousand, four hundred six".