61339830565 has 32 divisors (see below), whose sum is σ = 87069991680. Its totient is φ = 41047243776.

The previous prime is 61339830557. The next prime is 61339830619. The reversal of 61339830565 is 56503893316.

It is a cyclic number.

It is not a de Polignac number, because 61339830565 - 2³ = 61339830557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1051332 + ... + 1108141.

It is an arithmetic number, because the mean of its divisors is an integer number (2720937240).

Almost surely, 2^61339830565 is an apocalyptic number.

61339830565 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61339830565 is a deficient number, since it is larger than the sum of its proper divisors (25730161115).

61339830565 is a wasteful number, since it uses less digits than its factorization.

61339830565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159533.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The spelling of 61339830565 in words is "sixty-one billion, three hundred thirty-nine million, eight hundred thirty thousand, five hundred sixty-five".