61716501281 has 8 divisors (see below), whose sum is σ = 62210064384. Its totient is φ = 61223057280.

The previous prime is 61716501263. The next prime is 61716501359. The reversal of 61716501281 is 18210561716.

61716501281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61716501281 - 2¹⁴ = 61716484897 is a prime.

It is a super-2 number, since 2×61716501281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61716501251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218641 + ... + 1268273.

It is an arithmetic number, because the mean of its divisors is an integer number (7776258048).

Almost surely, 2^61716501281 is an apocalyptic number.

It is an amenable number.

61716501281 is a deficient number, since it is larger than the sum of its proper divisors (493563103).

61716501281 is a wasteful number, since it uses less digits than its factorization.

61716501281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59551.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 61716501281 in words is "sixty-one billion, seven hundred sixteen million, five hundred one thousand, two hundred eighty-one".