1656181180560 has 160 divisors (see below), whose sum is σ = 5249528258688. Its totient is φ = 431783239680.

The previous prime is 1656181180559. The next prime is 1656181180567. The reversal of 1656181180560 is 650811816561.

It is a super-2 number, since 2×1656181180560² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1656181180567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3369720 + ... + 3829800.

Almost surely, 2^{1656181180560} is an apocalyptic number.

1656181180560 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 1656181180560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2624764129344).

1656181180560 is an abundant number, since it is smaller than the sum of its proper divisors (3593347078128).

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

1656181180560 is a wasteful number, since it uses less digits than its factorization.

1656181180560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460433 (or 460427 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 48.

The spelling of 1656181180560 in words is "one trillion, six hundred fifty-six billion, one hundred eighty-one million, one hundred eighty thousand, five hundred sixty".