1861631239692 has 192 divisors, whose sum is σ = 5103040947200. Its totient is φ = 517279924224.

The previous prime is 1861631239669. The next prime is 1861631239703. The reversal of 1861631239692 is 2969321361681.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 164755059 + ... + 164766357.

Almost surely, 2^{1861631239692} is an apocalyptic number.

1861631239692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1861631239692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2551520473600).

1861631239692 is an abundant number, since it is smaller than the sum of its proper divisors (3241409707508).

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

1861631239692 is a wasteful number, since it uses less digits than its factorization.

1861631239692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11760 (or 11758 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 57.

The spelling of 1861631239692 in words is "one trillion, eight hundred sixty-one billion, six hundred thirty-one million, two hundred thirty-nine thousand, six hundred ninety-two".