31147989534645 has 16 divisors (see below), whose sum is σ = 50060266593792. Its totient is φ = 16537766639040.

The previous prime is 31147989534583. The next prime is 31147989534659. The reversal of 31147989534645 is 54643598974113.

It is not a de Polignac number, because 31147989534645 - 2¹⁹ = 31147989010357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31147989534645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4655899426 + ... + 4655906115.

It is an arithmetic number, because the mean of its divisors is an integer number (3128766662112).

Almost surely, 2^{31147989534645} is an apocalyptic number.

It is an amenable number.

31147989534645 is a deficient number, since it is larger than the sum of its proper divisors (18912277059147).

31147989534645 is a wasteful number, since it uses less digits than its factorization.

31147989534645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9311805772.

The product of its digits is 391910400, while the sum is 69.

The spelling of 31147989534645 in words is "thirty-one trillion, one hundred forty-seven billion, nine hundred eighty-nine million, five hundred thirty-four thousand, six hundred forty-five".