1561700404000 has 192 divisors, whose sum is σ = 4199596232832. Its totient is φ = 566036352000.

The previous prime is 1561700403979. The next prime is 1561700404003. The reversal of 1561700404000 is 4040071651.

It is a self number, because there is not a number n which added to its sum of digits gives 1561700404000.

It is not an unprimeable number, because it can be changed into a prime (1561700404003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13450194 + ... + 13565806.

It is an arithmetic number, because the mean of its divisors is an integer number (21872897046).

Almost surely, 2^{1561700404000} is an apocalyptic number.

1561700404000 is a gapful number since it is divisible by the number (10) 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 1561700404000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2099798116416).

1561700404000 is an abundant number, since it is smaller than the sum of its proper divisors (2637895828832).

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

1561700404000 is a wasteful number, since it uses less digits than its factorization.

1561700404000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115956 (or 115938 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 1561700404000 its reverse (4040071651), we get a palindrome (1565740475651).

The spelling of 1561700404000 in words is "one trillion, five hundred sixty-one billion, seven hundred million, four hundred four thousand".