1573549720972 has 6 divisors (see below), whose sum is σ = 2753712011708. Its totient is φ = 786774860484.

The previous prime is 1573549720949. The next prime is 1573549720979. The reversal of 1573549720972 is 2790279453751.

It is a self number, because there is not a number n which added to its sum of digits gives 1573549720972.

It is not an unprimeable number, because it can be changed into a prime (1573549720979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196693715118 + ... + 196693715125.

Almost surely, 2^{1573549720972} is an apocalyptic number.

It is an amenable number.

1573549720972 is a deficient number, since it is larger than the sum of its proper divisors (1180162290736).

1573549720972 is a wasteful number, since it uses less digits than its factorization.

1573549720972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393387430247 (or 393387430245 counting only the distinct ones).

The product of its (nonzero) digits is 33339600, while the sum is 61.

The spelling of 1573549720972 in words is "one trillion, five hundred seventy-three billion, five hundred forty-nine million, seven hundred twenty thousand, nine hundred seventy-two".