1531747162172 has 12 divisors (see below), whose sum is σ = 2725990712760. Its totient is φ = 752892672816.

The previous prime is 1531747162117. The next prime is 1531747162193. The reversal of 1531747162172 is 2712617471351.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245226803 + ... + 3245227274.

It is an arithmetic number, because the mean of its divisors is an integer number (227165892730).

Almost surely, 2^{1531747162172} is an apocalyptic number.

It is an amenable number.

1531747162172 is a deficient number, since it is larger than the sum of its proper divisors (1194243550588).

1531747162172 is a wasteful number, since it uses less digits than its factorization.

1531747162172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490454140 (or 6490454138 counting only the distinct ones).

The product of its digits is 493920, while the sum is 47.

The spelling of 1531747162172 in words is "one trillion, five hundred thirty-one billion, seven hundred forty-seven million, one hundred sixty-two thousand, one hundred seventy-two".