561392391921480 has 384 divisors, whose sum is σ = 2157394318560000. Its totient is φ = 123875108001792.

The previous prime is 561392391921437. The next prime is 561392391921541. The reversal of 561392391921480 is 84129193293165.

561392391921480 is a `hidden beast` number, since 5 + 6 + 1 + 3 + 92 + 39 + 19 + 21 + 480 = 666.

It is a super-2 number, since 2×561392391921480² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 494842726 + ... + 495975914.

It is an arithmetic number, because the mean of its divisors is an integer number (5618214371250).

Almost surely, 2^{561392391921480} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561392391921480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1078697159280000).

561392391921480 is an abundant number, since it is smaller than the sum of its proper divisors (1596001926638520).

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

561392391921480 is a wasteful number, since it uses less digits than its factorization.

561392391921480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140021 (or 1140014 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The spelling of 561392391921480 in words is "five hundred sixty-one trillion, three hundred ninety-two billion, three hundred ninety-one million, nine hundred twenty-one thousand, four hundred eighty".