61583799421 has 8 divisors (see below), whose sum is σ = 62330375520. Its totient is φ = 60837333072.

The previous prime is 61583799413. The next prime is 61583799427. The reversal of 61583799421 is 12499738516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61583799421 - 2³ = 61583799413 is a prime.

It is a super-2 number, since 2×61583799421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61583799427) 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, 2015766 + ... + 2046088.

It is an arithmetic number, because the mean of its divisors is an integer number (7791296940).

Almost surely, 2^61583799421 is an apocalyptic number.

It is an amenable number.

61583799421 is a deficient number, since it is larger than the sum of its proper divisors (746576099).

61583799421 is a wasteful number, since it uses less digits than its factorization.

61583799421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54875.

The product of its digits is 3265920, while the sum is 55.

The spelling of 61583799421 in words is "sixty-one billion, five hundred eighty-three million, seven hundred ninety-nine thousand, four hundred twenty-one".