61849645807 has 2 divisors, whose sum is σ = 61849645808. Its totient is φ = 61849645806.

The previous prime is 61849645783. The next prime is 61849645829. The reversal of 61849645807 is 70854694816.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61849645807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61849645867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30924822903 + 30924822904.

It is an arithmetic number, because the mean of its divisors is an integer number (30924822904).

Almost surely, 2^61849645807 is an apocalyptic number.

61849645807 is a deficient number, since it is larger than the sum of its proper divisors (1).

61849645807 is an equidigital number, since it uses as much as digits as its factorization.

61849645807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 61849645807 in words is "sixty-one billion, eight hundred forty-nine million, six hundred forty-five thousand, eight hundred seven".