561231262545 has 32 divisors (see below), whose sum is σ = 901984636800. Its totient is φ = 297985595904.

The previous prime is 561231262517. The next prime is 561231262547. The reversal of 561231262545 is 545262132165.

It is not a de Polignac number, because 561231262545 - 2⁵ = 561231262513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561231262497 and 561231262506.

It is not an unprimeable number, because it can be changed into a prime (561231262547) 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, 26792686 + ... + 26813624.

It is an arithmetic number, because the mean of its divisors is an integer number (28187019900).

Almost surely, 2^561231262545 is an apocalyptic number.

It is an amenable number.

561231262545 is a deficient number, since it is larger than the sum of its proper divisors (340753374255).

561231262545 is a wasteful number, since it uses less digits than its factorization.

561231262545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28849.

The product of its digits is 432000, while the sum is 42.

The spelling of 561231262545 in words is "five hundred sixty-one billion, two hundred thirty-one million, two hundred sixty-two thousand, five hundred forty-five".