2001881562390 has 48 divisors (see below), whose sum is σ = 5397665848848. Its totient is φ = 533835082656.

The previous prime is 2001881562361. The next prime is 2001881562397. The reversal of 2001881562390 is 932651881002.

2001881562390 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 8 + 8 + 15 + 623 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001881562397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411907357 + ... + 411912216.

It is an arithmetic number, because the mean of its divisors is an integer number (112451371851).

Almost surely, 2^{2001881562390} is an apocalyptic number.

2001881562390 is an abundant number, since it is smaller than the sum of its proper divisors (3395784286458).

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

2001881562390 is an equidigital number, since it uses as much as digits as its factorization.

2001881562390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823819595 (or 823819583 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 2001881562390 in words is "two trillion, one billion, eight hundred eighty-one million, five hundred sixty-two thousand, three hundred ninety".