61853994950 has 24 divisors (see below), whose sum is σ = 125507379960. Its totient is φ = 22492361600.

The previous prime is 61853994931. The next prime is 61853994959. The reversal of 61853994950 is 5949935816.

It is a self number, because there is not a number n which added to its sum of digits gives 61853994950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61853994959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56230355 + ... + 56231454.

It is an arithmetic number, because the mean of its divisors is an integer number (5229474165).

Almost surely, 2^61853994950 is an apocalyptic number.

61853994950 is an abundant number, since it is smaller than the sum of its proper divisors (63653385010).

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

61853994950 is a wasteful number, since it uses less digits than its factorization.

61853994950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112461832 (or 112461827 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 61853994950 in words is "sixty-one billion, eight hundred fifty-three million, nine hundred ninety-four thousand, nine hundred fifty".