27953611644 has 48 divisors (see below), whose sum is σ = 74551635200. Its totient is φ = 7985817216.

The previous prime is 27953611643. The next prime is 27953611681. The reversal of 27953611644 is 44611635972.

It is a junction number, because it is equal to n+sod(n) for n = 27953611593 and 27953611602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27953611643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1069767 + ... + 1095585.

Almost surely, 2^27953611644 is an apocalyptic number.

It is an amenable number.

27953611644 is an abundant number, since it is smaller than the sum of its proper divisors (46598023556).

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

27953611644 is a wasteful number, since it uses less digits than its factorization.

27953611644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38722 (or 38720 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The spelling of 27953611644 in words is "twenty-seven billion, nine hundred fifty-three million, six hundred eleven thousand, six hundred forty-four".