61724360475751 has 4 divisors (see below), whose sum is σ = 61724523894832. Its totient is φ = 61724197056672.

The previous prime is 61724360475683. The next prime is 61724360475769. The reversal of 61724360475751 is 15757406342716.

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

It is a cyclic number.

It is not a de Polignac number, because 61724360475751 - 2⁷ = 61724360475623 is a prime.

It is a super-2 number, since 2×61724360475751² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61724360425751) 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 in 3 ways as a sum of consecutive naturals, for example, 81141666 + ... + 81898831.

It is an arithmetic number, because the mean of its divisors is an integer number (15431130973708).

Almost surely, 2^{61724360475751} is an apocalyptic number.

61724360475751 is a deficient number, since it is larger than the sum of its proper divisors (163419081).

61724360475751 is a wasteful number, since it uses less digits than its factorization.

61724360475751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163419080.

The product of its (nonzero) digits is 29635200, while the sum is 58.

The spelling of 61724360475751 in words is "sixty-one trillion, seven hundred twenty-four billion, three hundred sixty million, four hundred seventy-five thousand, seven hundred fifty-one".