561557116380 has 48 divisors (see below), whose sum is σ = 1693310691744. Its totient is φ = 138229443840.

The previous prime is 561557116363. The next prime is 561557116427. The reversal of 561557116380 is 83611755165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359971731 + ... + 359973290.

It is an arithmetic number, because the mean of its divisors is an integer number (35277306078).

Almost surely, 2^561557116380 is an apocalyptic number.

It is an amenable number.

561557116380 is an abundant number, since it is smaller than the sum of its proper divisors (1131753575364).

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

561557116380 is a wasteful number, since it uses less digits than its factorization.

561557116380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719945046 (or 719945044 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 48.

The spelling of 561557116380 in words is "five hundred sixty-one billion, five hundred fifty-seven million, one hundred sixteen thousand, three hundred eighty".