61358326399 has 4 divisors (see below), whose sum is σ = 61359911536. Its totient is φ = 61356741264.

The previous prime is 61358326339. The next prime is 61358326409. The reversal of 61358326399 is 99362385316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61358326399 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 (61358326339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733014 + ... + 812419.

It is an arithmetic number, because the mean of its divisors is an integer number (15339977884).

Almost surely, 2^61358326399 is an apocalyptic number.

61358326399 is a deficient number, since it is larger than the sum of its proper divisors (1585137).

61358326399 is a wasteful number, since it uses less digits than its factorization.

61358326399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585136.

The product of its digits is 6298560, while the sum is 55.

The spelling of 61358326399 in words is "sixty-one billion, three hundred fifty-eight million, three hundred twenty-six thousand, three hundred ninety-nine".