2156661450325 has 12 divisors (see below), whose sum is σ = 2674347045120. Its totient is φ = 1725273130160.

The previous prime is 2156661450313. The next prime is 2156661450341. The reversal of 2156661450325 is 5230541666512.

It is not a de Polignac number, because 2156661450325 - 2³¹ = 2154513966677 is a prime.

It is a super-2 number, since 2×2156661450325² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 606709 + ... + 2163658.

It is an arithmetic number, because the mean of its divisors is an integer number (222862253760).

Almost surely, 2^{2156661450325} is an apocalyptic number.

2156661450325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2156661450325 is a deficient number, since it is larger than the sum of its proper divisors (517685594795).

2156661450325 is a wasteful number, since it uses less digits than its factorization.

2156661450325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801516 (or 2801511 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 2156661450325 in words is "two trillion, one hundred fifty-six billion, six hundred sixty-one million, four hundred fifty thousand, three hundred twenty-five".