61259091281 has 8 divisors (see below), whose sum is σ = 64975495200. Its totient is φ = 57591911520.

The previous prime is 61259091263. The next prime is 61259091343. The reversal of 61259091281 is 18219095216.

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 61259091281 - 2²⁶ = 61191982417 is a prime.

It is a super-2 number, since 2×61259091281² (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 (61259091221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12303476 + ... + 12308453.

It is an arithmetic number, because the mean of its divisors is an integer number (8121936900).

Almost surely, 2^61259091281 is an apocalyptic number.

It is an amenable number.

61259091281 is a deficient number, since it is larger than the sum of its proper divisors (3716403919).

61259091281 is a wasteful number, since it uses less digits than its factorization.

61259091281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24612079.

The product of its (nonzero) digits is 77760, while the sum is 44.

The spelling of 61259091281 in words is "sixty-one billion, two hundred fifty-nine million, ninety-one thousand, two hundred eighty-one".