61865633228 has 48 divisors (see below), whose sum is σ = 127757414400. Its totient is φ = 25651563840.

The previous prime is 61865633227. The next prime is 61865633231. The reversal of 61865633228 is 82233656816.

It is not an unprimeable number, because it can be changed into a prime (61865633227) 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, 4253753 + ... + 4268271.

It is an arithmetic number, because the mean of its divisors is an integer number (2661612800).

Almost surely, 2^61865633228 is an apocalyptic number.

It is an amenable number.

61865633228 is an abundant number, since it is smaller than the sum of its proper divisors (65891781172).

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

61865633228 is a wasteful number, since it uses less digits than its factorization.

61865633228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19470 (or 19468 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 50.

The spelling of 61865633228 in words is "sixty-one billion, eight hundred sixty-five million, six hundred thirty-three thousand, two hundred twenty-eight".