61723837751 has 2 divisors, whose sum is σ = 61723837752. Its totient is φ = 61723837750.

The previous prime is 61723837739. The next prime is 61723837787. The reversal of 61723837751 is 15773832716.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61723837751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61723837751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61723837951) 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, 30861918875 + 30861918876.

It is an arithmetic number, because the mean of its divisors is an integer number (30861918876).

Almost surely, 2^61723837751 is an apocalyptic number.

61723837751 is a deficient number, since it is larger than the sum of its proper divisors (1).

61723837751 is an equidigital number, since it uses as much as digits as its factorization.

61723837751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 50.

The spelling of 61723837751 in words is "sixty-one billion, seven hundred twenty-three million, eight hundred thirty-seven thousand, seven hundred fifty-one".