61421823892 has 48 divisors (see below), whose sum is σ = 126320040000. Its totient is φ = 25763189760.

The previous prime is 61421823857. The next prime is 61421823893. The reversal of 61421823892 is 29832812416.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1986084 + ... + 2016772.

It is an arithmetic number, because the mean of its divisors is an integer number (2631667500).

Almost surely, 2^61421823892 is an apocalyptic number.

It is an amenable number.

61421823892 is an abundant number, since it is smaller than the sum of its proper divisors (64898216108).

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

61421823892 is a wasteful number, since it uses less digits than its factorization.

61421823892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34216 (or 34214 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The spelling of 61421823892 in words is "sixty-one billion, four hundred twenty-one million, eight hundred twenty-three thousand, eight hundred ninety-two".