1861358599488 has 56 divisors (see below), whose sum is σ = 4937249980192. Its totient is φ = 618889987584.

The previous prime is 1861358599483. The next prime is 1861358599489. The reversal of 1861358599488 is 8849958531681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861358599481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12133570 + ... + 12286017.

Almost surely, 2^{1861358599488} is an apocalyptic number.

It is an amenable number.

1861358599488 is an abundant number, since it is smaller than the sum of its proper divisors (3075891380704).

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

1861358599488 is a wasteful number, since it uses less digits than its factorization.

1861358599488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24419999 (or 24419989 counting only the distinct ones).

The product of its digits is 597196800, while the sum is 75.

The spelling of 1861358599488 in words is "one trillion, eight hundred sixty-one billion, three hundred fifty-eight million, five hundred ninety-nine thousand, four hundred eighty-eight".