3634432431561 has 12 divisors (see below), whose sum is σ = 5558543719092. Its totient is φ = 2280428192256.

The previous prime is 3634432431559. The next prime is 3634432431587. The reversal of 3634432431561 is 1651342344363.

3634432431561 is a `hidden beast` number, since 3 + 6 + 3 + 4 + 4 + 324 + 315 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2742852696336 + 891579735225 = 1656156^2 + 944235^2 .

It is not a de Polignac number, because 3634432431561 - 2¹ = 3634432431559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3634432431521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11877230016 + ... + 11877230321.

It is an arithmetic number, because the mean of its divisors is an integer number (463211976591).

Almost surely, 2^{3634432431561} is an apocalyptic number.

It is an amenable number.

3634432431561 is a deficient number, since it is larger than the sum of its proper divisors (1924111287531).

3634432431561 is a wasteful number, since it uses less digits than its factorization.

3634432431561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23754460360 (or 23754460357 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 45.

The spelling of 3634432431561 in words is "three trillion, six hundred thirty-four billion, four hundred thirty-two million, four hundred thirty-one thousand, five hundred sixty-one".