61724236847 has 12 divisors (see below), whose sum is σ = 77324868936. Its totient is φ = 48836758320.

The previous prime is 61724236801. The next prime is 61724236853. The reversal of 61724236847 is 74863242716.

It is not a de Polignac number, because 61724236847 - 2¹⁸ = 61723974703 is a prime.

It is a super-3 number, since 3×61724236847³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61724236795 and 61724236804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61724236897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48448529 + ... + 48449802.

It is an arithmetic number, because the mean of its divisors is an integer number (6443739078).

Almost surely, 2^61724236847 is an apocalyptic number.

61724236847 is a deficient number, since it is larger than the sum of its proper divisors (15600632089).

61724236847 is a wasteful number, since it uses less digits than its factorization.

61724236847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96898358 (or 96898351 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 50.

The spelling of 61724236847 in words is "sixty-one billion, seven hundred twenty-four million, two hundred thirty-six thousand, eight hundred forty-seven".