61699082393 has 4 divisors (see below), whose sum is σ = 66445165668. Its totient is φ = 56952999120.

The previous prime is 61699082371. The next prime is 61699082399. The reversal of 61699082393 is 39328099616.

61699082393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5997418249 + 55701664144 = 77443^2 + 236012^2 .

It is a cyclic number.

It is not a de Polignac number, because 61699082393 - 2⁶ = 61699082329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61699082399) 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, 2373041618 + ... + 2373041643.

It is an arithmetic number, because the mean of its divisors is an integer number (16611291417).

Almost surely, 2^61699082393 is an apocalyptic number.

It is an amenable number.

61699082393 is a deficient number, since it is larger than the sum of its proper divisors (4746083275).

61699082393 is a wasteful number, since it uses less digits than its factorization.

61699082393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746083274.

The product of its (nonzero) digits is 3779136, while the sum is 56.

Adding to 61699082393 its sum of digits (56), we get a square (61699082449 = 248393²).

The spelling of 61699082393 in words is "sixty-one billion, six hundred ninety-nine million, eighty-two thousand, three hundred ninety-three".