561257178272 has 192 divisors, whose sum is σ = 1358350560000. Its totient is φ = 227554983936.

The previous prime is 561257178263. The next prime is 561257178283. The reversal of 561257178272 is 272871752165.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193735928 + ... + 193738824.

It is an arithmetic number, because the mean of its divisors is an integer number (7074742500).

Almost surely, 2^561257178272 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 561257178272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (679175280000).

561257178272 is an abundant number, since it is smaller than the sum of its proper divisors (797093381728).

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

561257178272 is a wasteful number, since it uses less digits than its factorization.

561257178272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876 (or 3854 counting only the distinct ones).

The product of its digits is 3292800, while the sum is 53.

The spelling of 561257178272 in words is "five hundred sixty-one billion, two hundred fifty-seven million, one hundred seventy-eight thousand, two hundred seventy-two".