27477432154721 has 16 divisors (see below), whose sum is σ = 29220697973376. Its totient is φ = 25748491681536.

The previous prime is 27477432154709. The next prime is 27477432154729. The reversal of 27477432154721 is 12745123477472.

It is a cyclic number.

It is not a de Polignac number, because 27477432154721 - 2²⁶ = 27477365045857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27477432154729) 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, 553460 + ... + 7433786.

It is an arithmetic number, because the mean of its divisors is an integer number (1826293623336).

Almost surely, 2^{27477432154721} is an apocalyptic number.

It is an amenable number.

27477432154721 is a deficient number, since it is larger than the sum of its proper divisors (1743265818655).

27477432154721 is a wasteful number, since it uses less digits than its factorization.

27477432154721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6881368.

The product of its digits is 18439680, while the sum is 56.

The spelling of 27477432154721 in words is "twenty-seven trillion, four hundred seventy-seven billion, four hundred thirty-two million, one hundred fifty-four thousand, seven hundred twenty-one".