1861008899344 has 135 divisors (see below), whose sum is σ = 4252779837687. Its totient is φ = 786623541312.

The previous prime is 1861008899339. The next prime is 1861008899357. The reversal of 1861008899344 is 4439988001681.

The square root of 1861008899344 is 1364188.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3170372619 + ... + 3170373205.

Almost surely, 2^{1861008899344} is an apocalyptic number.

1861008899344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1861008899344 is the 1364188-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1861008899344

1861008899344 is an abundant number, since it is smaller than the sum of its proper divisors (2391770938343).

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

1861008899344 is an frugal number, since it uses more digits than its factorization.

1861008899344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 61.

The spelling of 1861008899344 in words is "one trillion, eight hundred sixty-one billion, eight million, eight hundred ninety-nine thousand, three hundred forty-four".