561911812357 has 16 divisors (see below), whose sum is σ = 691485275520. Its totient is φ = 445623833088.

The previous prime is 561911812337. The next prime is 561911812373. The reversal of 561911812357 is 753218119165.

It is not a de Polignac number, because 561911812357 - 2³¹ = 559764328709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561911812357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561911812307) 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, 40009488 + ... + 40023529.

It is an arithmetic number, because the mean of its divisors is an integer number (43217829720).

Almost surely, 2^561911812357 is an apocalyptic number.

It is an amenable number.

561911812357 is a deficient number, since it is larger than the sum of its proper divisors (129573463163).

561911812357 is a wasteful number, since it uses less digits than its factorization.

561911812357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80033100.

The product of its digits is 453600, while the sum is 49.

The spelling of 561911812357 in words is "five hundred sixty-one billion, nine hundred eleven million, eight hundred twelve thousand, three hundred fifty-seven".