61724073445973 has 4 divisors (see below), whose sum is σ = 63159517014528. Its totient is φ = 60288629877420.

The previous prime is 61724073445913. The next prime is 61724073445997. The reversal of 61724073445973 is 37954437042716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61724073445973 - 2¹⁴ = 61724073429589 is a prime.

It is a super-2 number, since 2×61724073445973² (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 (61724073445913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717721784213 + ... + 717721784298.

It is an arithmetic number, because the mean of its divisors is an integer number (15789879253632).

Almost surely, 2^{61724073445973} is an apocalyptic number.

It is an amenable number.

61724073445973 is a deficient number, since it is larger than the sum of its proper divisors (1435443568555).

61724073445973 is a wasteful number, since it uses less digits than its factorization.

61724073445973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435443568554.

The product of its (nonzero) digits is 106686720, while the sum is 62.

The spelling of 61724073445973 in words is "sixty-one trillion, seven hundred twenty-four billion, seventy-three million, four hundred forty-five thousand, nine hundred seventy-three".