61776299807 has 2 divisors, whose sum is σ = 61776299808. Its totient is φ = 61776299806.

The previous prime is 61776299801. The next prime is 61776299831. The reversal of 61776299807 is 70899267716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61776299807 - 2⁴ = 61776299791 is a prime.

It is a super-2 number, since 2×61776299807² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61776299807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61776299801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30888149903 + 30888149904.

It is an arithmetic number, because the mean of its divisors is an integer number (30888149904).

Almost surely, 2^61776299807 is an apocalyptic number.

61776299807 is a deficient number, since it is larger than the sum of its proper divisors (1).

61776299807 is an equidigital number, since it uses as much as digits as its factorization.

61776299807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16003008, while the sum is 62.

The spelling of 61776299807 in words is "sixty-one billion, seven hundred seventy-six million, two hundred ninety-nine thousand, eight hundred seven".