1537273199920 has 40 divisors (see below), whose sum is σ = 3585802462704. Its totient is φ = 612906308352.

The previous prime is 1537273199911. The next prime is 1537273199927. The reversal of 1537273199920 is 299913727351.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1537273199927) 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, 31271719 + ... + 31320838.

Almost surely, 2^{1537273199920} is an apocalyptic number.

1537273199920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1537273199920 is an abundant number, since it is smaller than the sum of its proper divisors (2048529262784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1537273199920 is a wasteful number, since it uses less digits than its factorization.

1537273199920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62592877 (or 62592871 counting only the distinct ones).

The product of its (nonzero) digits is 6429780, while the sum is 58.

The spelling of 1537273199920 in words is "one trillion, five hundred thirty-seven billion, two hundred seventy-three million, one hundred ninety-nine thousand, nine hundred twenty".