612561113020 has 48 divisors (see below), whose sum is σ = 1356188883840. Its totient is φ = 231767320896.

The previous prime is 612561113011. The next prime is 612561113027. The reversal of 612561113020 is 20311165216.

It is a super-2 number, since 2×612561113020² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 612561113020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612561113027) 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, 1009162 + ... + 1497841.

It is an arithmetic number, because the mean of its divisors is an integer number (28253935080).

Almost surely, 2^612561113020 is an apocalyptic number.

It is an amenable number.

612561113020 is an abundant number, since it is smaller than the sum of its proper divisors (743627770820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612561113020 is a wasteful number, since it uses less digits than its factorization.

612561113020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507674 (or 2507672 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 612561113020 its reverse (20311165216), we get a palindrome (632872278236).

The spelling of 612561113020 in words is "six hundred twelve billion, five hundred sixty-one million, one hundred thirteen thousand, twenty".