61856196536 has 32 divisors (see below), whose sum is σ = 118597227840. Its totient is φ = 30231927168.

The previous prime is 61856196533. The next prime is 61856196551. The reversal of 61856196536 is 63569165816.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61856196533) 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, 196466 + ... + 402878.

It is an arithmetic number, because the mean of its divisors is an integer number (3706163370).

Almost surely, 2^61856196536 is an apocalyptic number.

It is an amenable number.

61856196536 is a deficient number, since it is larger than the sum of its proper divisors (56741031304).

61856196536 is a wasteful number, since it uses less digits than its factorization.

61856196536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207263 (or 207259 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 56.

The spelling of 61856196536 in words is "sixty-one billion, eight hundred fifty-six million, one hundred ninety-six thousand, five hundred thirty-six".