1561011361364 has 24 divisors (see below), whose sum is σ = 3362178317568. Its totient is φ = 617542956000.

The previous prime is 1561011361363. The next prime is 1561011361387. The reversal of 1561011361364 is 4631631101651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561011361363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2144246012 + ... + 2144246739.

It is an arithmetic number, because the mean of its divisors is an integer number (140090763232).

Almost surely, 2^{1561011361364} is an apocalyptic number.

1561011361364 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1561011361364 is an abundant number, since it is smaller than the sum of its proper divisors (1801166956204).

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

1561011361364 is a wasteful number, since it uses less digits than its factorization.

1561011361364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288492775 (or 4288492773 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 1561011361364 in words is "one trillion, five hundred sixty-one billion, eleven million, three hundred sixty-one thousand, three hundred sixty-four".