561402386993 has 4 divisors (see below), whose sum is σ = 641602728000. Its totient is φ = 481202045988.

The previous prime is 561402386917. The next prime is 561402387001. The reversal of 561402386993 is 399683204165.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561402386993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561402386693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40100170493 + ... + 40100170506.

It is an arithmetic number, because the mean of its divisors is an integer number (160400682000).

Almost surely, 2^561402386993 is an apocalyptic number.

It is an amenable number.

561402386993 is a deficient number, since it is larger than the sum of its proper divisors (80200341007).

561402386993 is an equidigital number, since it uses as much as digits as its factorization.

561402386993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80200341006.

The product of its (nonzero) digits is 8398080, while the sum is 56.

The spelling of 561402386993 in words is "five hundred sixty-one billion, four hundred two million, three hundred eighty-six thousand, nine hundred ninety-three".