1147977774681 has 16 divisors (see below), whose sum is σ = 1636720795008. Its totient is φ = 713168096000.

The previous prime is 1147977774661. The next prime is 1147977774733. The reversal of 1147977774681 is 1864777797411.

It is a cyclic number.

It is not a de Polignac number, because 1147977774681 - 2⁷ = 1147977774553 is a prime.

It is a super-2 number, since 2×1147977774681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1147977774661) 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, 111427365 + ... + 111437666.

It is an arithmetic number, because the mean of its divisors is an integer number (102295049688).

Almost surely, 2^{1147977774681} is an apocalyptic number.

It is an amenable number.

1147977774681 is a deficient number, since it is larger than the sum of its proper divisors (488743020327).

1147977774681 is a wasteful number, since it uses less digits than its factorization.

1147977774681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222865152.

The product of its digits is 116169984, while the sum is 69.

The spelling of 1147977774681 in words is "one trillion, one hundred forty-seven billion, nine hundred seventy-seven million, seven hundred seventy-four thousand, six hundred eighty-one".