27772001656 has 48 divisors (see below), whose sum is σ = 60597755640. Its totient is φ = 11897645760.

The previous prime is 27772001639. The next prime is 27772001657. The reversal of 27772001656 is 65610027772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27772001657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1109131 + ... + 1133893.

Almost surely, 2^27772001656 is an apocalyptic number.

It is an amenable number.

27772001656 is an abundant number, since it is smaller than the sum of its proper divisors (32825753984).

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

27772001656 is a wasteful number, since it uses less digits than its factorization.

27772001656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27644 (or 27633 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 27772001656 in words is "twenty-seven billion, seven hundred seventy-two million, one thousand, six hundred fifty-six".