11397774371481 has 27 divisors (see below), whose sum is σ = 16855870886517. Its totient is φ = 7421522978520.

The previous prime is 11397774371377. The next prime is 11397774371497. The reversal of 11397774371481 is 18417347779311.

The square root of 11397774371481 is 3376059.

It is a perfect power (a square), and thus also a powerful number.

11397774371481 is a `hidden beast` number, since 1 + 1 + 3 + 97 + 77 + 437 + 1 + 48 + 1 = 666.

It is not a de Polignac number, because 11397774371481 - 2⁴¹ = 9198751115929 is a prime.

It is a super-2 number, since 2×11397774371481² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11397774376481) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 435498526 + ... + 435524696.

Almost surely, 2^{11397774371481} is an apocalyptic number.

11397774371481 is the 3376059-th square number.

11397774371481 is the 1688030-th centered octagonal number.

It is an amenable number.

11397774371481 is a deficient number, since it is larger than the sum of its proper divisors (5458096515036).

11397774371481 is an frugal number, since it uses more digits than its factorization.

11397774371481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52434 (or 26217 counting only the distinct ones).

The product of its digits is 24893568, while the sum is 63.

The spelling of 11397774371481 in words is "eleven trillion, three hundred ninety-seven billion, seven hundred seventy-four million, three hundred seventy-one thousand, four hundred eighty-one".