27916557501845 has 16 divisors (see below), whose sum is σ = 35548065444528. Its totient is φ = 20973531033600.

The previous prime is 27916557501839. The next prime is 27916557501871. The reversal of 27916557501845 is 54810575561972.

It can be written as a sum of positive squares in 8 ways, for example, as 97958358289 + 27818599143556 = 312983^2 + 5274334^2 .

It is not a de Polignac number, because 27916557501845 - 2¹² = 27916557497749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359293856 + ... + 359371545.

It is an arithmetic number, because the mean of its divisors is an integer number (2221754090283).

Almost surely, 2^{27916557501845} is an apocalyptic number.

It is an amenable number.

27916557501845 is a deficient number, since it is larger than the sum of its proper divisors (7631507942683).

27916557501845 is a wasteful number, since it uses less digits than its factorization.

27916557501845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718665880.

The product of its (nonzero) digits is 105840000, while the sum is 65.

The spelling of 27916557501845 in words is "twenty-seven trillion, nine hundred sixteen billion, five hundred fifty-seven million, five hundred one thousand, eight hundred forty-five".