31347780673 has 8 divisors (see below), whose sum is σ = 34206500736. Its totient is φ = 28490547600.

The previous prime is 31347780643. The next prime is 31347780677. The reversal of 31347780673 is 37608774313.

It is a happy number.

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 31347780673 - 2²¹ = 31345683521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31347780677) 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, 327433 + ... + 412198.

It is an arithmetic number, because the mean of its divisors is an integer number (4275812592).

Almost surely, 2^31347780673 is an apocalyptic number.

It is an amenable number.

31347780673 is a deficient number, since it is larger than the sum of its proper divisors (2858720063).

31347780673 is a wasteful number, since it uses less digits than its factorization.

31347780673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743495.

The product of its (nonzero) digits is 1778112, while the sum is 49.

The spelling of 31347780673 in words is "thirty-one billion, three hundred forty-seven million, seven hundred eighty thousand, six hundred seventy-three".