561494056390 has 32 divisors (see below), whose sum is σ = 1013940457920. Its totient is φ = 223875477504.

The previous prime is 561494056351. The next prime is 561494056391. The reversal of 561494056390 is 93650494165.

It is a happy number.

It is a super-2 number, since 2×561494056390² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561494056391) 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, 15190351 + ... + 15227269.

It is an arithmetic number, because the mean of its divisors is an integer number (31685639310).

Almost surely, 2^561494056390 is an apocalyptic number.

561494056390 is a deficient number, since it is larger than the sum of its proper divisors (452446401530).

561494056390 is a wasteful number, since it uses less digits than its factorization.

561494056390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41776.

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 561494056390 in words is "five hundred sixty-one billion, four hundred ninety-four million, fifty-six thousand, three hundred ninety".