1536819843972 has 24 divisors (see below), whose sum is σ = 4098186250816. Its totient is φ = 439091383968.

The previous prime is 1536819843971. The next prime is 1536819844073. The reversal of 1536819843972 is 2793489186351.

It is a happy number.

It is a super-2 number, since 2×1536819843972² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1536819843971) 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, 9147737083 + ... + 9147737250.

Almost surely, 2^{1536819843972} is an apocalyptic number.

1536819843972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1536819843972 is an abundant number, since it is smaller than the sum of its proper divisors (2561366406844).

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

1536819843972 is a wasteful number, since it uses less digits than its factorization.

1536819843972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18295474347 (or 18295474345 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 66.

The spelling of 1536819843972 in words is "one trillion, five hundred thirty-six billion, eight hundred nineteen million, eight hundred forty-three thousand, nine hundred seventy-two".