172742563516 has 6 divisors (see below), whose sum is σ = 302299486160. Its totient is φ = 86371281756.

The previous prime is 172742563493. The next prime is 172742563519. The reversal of 172742563516 is 615365247271.

It is a self number, because there is not a number n which added to its sum of digits gives 172742563516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172742563519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21592820436 + ... + 21592820443.

Almost surely, 2^172742563516 is an apocalyptic number.

It is an amenable number.

172742563516 is a deficient number, since it is larger than the sum of its proper divisors (129556922644).

172742563516 is a wasteful number, since it uses less digits than its factorization.

172742563516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43185640883 (or 43185640881 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 49.

The spelling of 172742563516 in words is "one hundred seventy-two billion, seven hundred forty-two million, five hundred sixty-three thousand, five hundred sixteen".