27945153877 has 16 divisors (see below), whose sum is σ = 29952627120. Its totient is φ = 25978703872.

The previous prime is 27945153869. The next prime is 27945153919. The reversal of 27945153877 is 77835154972.

It can be written as a sum of positive squares in 8 ways, for example, as 2766128836 + 25179025041 = 52594^2 + 158679^2 .

It is a cyclic number.

It is not a de Polignac number, because 27945153877 - 2³ = 27945153869 is a prime.

It is a super-2 number, since 2×27945153877² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27945153077) 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, 1523553 + ... + 1541785.

It is an arithmetic number, because the mean of its divisors is an integer number (1872039195).

Almost surely, 2^27945153877 is an apocalyptic number.

It is an amenable number.

27945153877 is a deficient number, since it is larger than the sum of its proper divisors (2007473243).

27945153877 is a wasteful number, since it uses less digits than its factorization.

27945153877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19352.

The product of its digits is 14817600, while the sum is 58.

The spelling of 27945153877 in words is "twenty-seven billion, nine hundred forty-five million, one hundred fifty-three thousand, eight hundred seventy-seven".