561354661100387 has 32 divisors (see below), whose sum is σ = 730410592665600. Its totient is φ = 418337577234720.

The previous prime is 561354661100333. The next prime is 561354661100399. The reversal of 561354661100387 is 783001166453165.

It is a de Polignac number, because none of the positive numbers 2^k-561354661100387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561354661100087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12329723 + ... + 35703380.

It is an arithmetic number, because the mean of its divisors is an integer number (22825331020800).

Almost surely, 2^{561354661100387} is an apocalyptic number.

561354661100387 is a deficient number, since it is larger than the sum of its proper divisors (169055931565213).

561354661100387 is a wasteful number, since it uses less digits than its factorization.

561354661100387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48039743.

The product of its (nonzero) digits is 10886400, while the sum is 56.

The spelling of 561354661100387 in words is "five hundred sixty-one trillion, three hundred fifty-four billion, six hundred sixty-one million, one hundred thousand, three hundred eighty-seven".