1561772445300 has 216 divisors, whose sum is σ = 5240359651072. Its totient is φ = 403037856000.

The previous prime is 1561772445271. The next prime is 1561772445319. The reversal of 1561772445300 is 35442771651.

1561772445300 is a `hidden beast` number, since 1 + 5 + 6 + 1 + 7 + 72 + 44 + 530 + 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 an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 283321 + ... + 1789920.

Almost surely, 2^{1561772445300} is an apocalyptic number.

1561772445300 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 1561772445300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2620179825536).

1561772445300 is an abundant number, since it is smaller than the sum of its proper divisors (3678587205772).

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

1561772445300 is a wasteful number, since it uses less digits than its factorization.

1561772445300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073301 (or 2073282 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 1561772445300 in words is "one trillion, five hundred sixty-one billion, seven hundred seventy-two million, four hundred forty-five thousand, three hundred".