61421823894 has 32 divisors (see below), whose sum is σ = 124213305600. Its totient is φ = 20246877152.

The previous prime is 61421823893. The next prime is 61421823959. The reversal of 61421823894 is 49832812416.

61421823894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61421823893) 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, 51607 + ... + 354269.

It is an arithmetic number, because the mean of its divisors is an integer number (3881665800).

Almost surely, 2^61421823894 is an apocalyptic number.

61421823894 is an abundant number, since it is smaller than the sum of its proper divisors (62791481706).

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

61421823894 is a wasteful number, since it uses less digits than its factorization.

61421823894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303044.

The product of its digits is 663552, while the sum is 48.

The spelling of 61421823894 in words is "sixty-one billion, four hundred twenty-one million, eight hundred twenty-three thousand, eight hundred ninety-four".