61286875236 has 96 divisors (see below), whose sum is σ = 168608926080. Its totient is φ = 19184919552.

The previous prime is 61286875231. The next prime is 61286875297. The reversal of 61286875236 is 63257868216.

61286875236 is a `hidden beast` number, since 61 + 286 + 8 + 75 + 236 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (61286875231) 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, 802531 + ... + 875573.

It is an arithmetic number, because the mean of its divisors is an integer number (1756342980).

Almost surely, 2^61286875236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61286875236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84304463040).

61286875236 is an abundant number, since it is smaller than the sum of its proper divisors (107322050844).

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

61286875236 is a wasteful number, since it uses less digits than its factorization.

61286875236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73530 (or 73522 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 61286875236 in words is "sixty-one billion, two hundred eighty-six million, eight hundred seventy-five thousand, two hundred thirty-six".