561938129744 has 40 divisors (see below), whose sum is σ = 1092545405952. Its totient is φ = 279991445760.

The previous prime is 561938129737. The next prime is 561938129747. The reversal of 561938129744 is 447921839165.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561938129747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20033009 + ... + 20061039.

Almost surely, 2^561938129744 is an apocalyptic number.

It is an amenable number.

561938129744 is a deficient number, since it is larger than the sum of its proper divisors (530607276208).

561938129744 is a wasteful number, since it uses less digits than its factorization.

561938129744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32355 (or 32349 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 59.

The spelling of 561938129744 in words is "five hundred sixty-one billion, nine hundred thirty-eight million, one hundred twenty-nine thousand, seven hundred forty-four".