2031661392600 has 864 divisors, whose sum is σ = 7659332628480. Its totient is φ = 444148669440.

The previous prime is 2031661392599. The next prime is 2031661392617. The reversal of 2031661392600 is 62931661302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 3140125477 + ... + 3140126123.

It is an arithmetic number, because the mean of its divisors is an integer number (8864968320).

Almost surely, 2^{2031661392600} is an apocalyptic number.

2031661392600 is a gapful number since it is divisible by the number (20) 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 2031661392600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3829666314240).

2031661392600 is an abundant number, since it is smaller than the sum of its proper divisors (5627671235880).

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

2031661392600 is a wasteful number, since it uses less digits than its factorization.

2031661392600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The spelling of 2031661392600 in words is "two trillion, thirty-one billion, six hundred sixty-one million, three hundred ninety-two thousand, six hundred".