61645302612 has 24 divisors (see below), whose sum is σ = 159821155200. Its totient is φ = 20548434168.

The previous prime is 61645302611. The next prime is 61645302613. The reversal of 61645302612 is 21620354616.

61645302612 is a `hidden beast` number, since 6 + 1 + 6 + 4 + 5 + 30 + 2 + 612 = 666.

61645302612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61645302611) and next prime (61645302613).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61645302611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285394812 + ... + 285395027.

It is an arithmetic number, because the mean of its divisors is an integer number (6659214800).

Almost surely, 2^61645302612 is an apocalyptic number.

It is an amenable number.

61645302612 is an abundant number, since it is smaller than the sum of its proper divisors (98175852588).

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

61645302612 is a wasteful number, since it uses less digits than its factorization.

61645302612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570789852 (or 570789844 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 61645302612 in words is "sixty-one billion, six hundred forty-five million, three hundred two thousand, six hundred twelve".