61212443383 has 24 divisors (see below), whose sum is σ = 75880952928. Its totient is φ = 48349596672.

The previous prime is 61212443353. The next prime is 61212443399. The reversal of 61212443383 is 38334421216.

61212443383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61212443383 - 2⁵ = 61212443351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61212443323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 657891 + ... + 745147.

It is an arithmetic number, because the mean of its divisors is an integer number (3161706372).

Almost surely, 2^61212443383 is an apocalyptic number.

61212443383 is a deficient number, since it is larger than the sum of its proper divisors (14668509545).

61212443383 is a wasteful number, since it uses less digits than its factorization.

61212443383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87883 (or 87870 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

Adding to 61212443383 its reverse (38334421216), we get a palindrome (99546864599).

The spelling of 61212443383 in words is "sixty-one billion, two hundred twelve million, four hundred forty-three thousand, three hundred eighty-three".