61881459 has 4 divisors (see below), whose sum is σ = 82508616. Its totient is φ = 41254304.

The previous prime is 61881451. The next prime is 61881481. The reversal of 61881459 is 95418816.

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 61881459 - 2³ = 61881451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61881459.

It is not an unprimeable number, because it can be changed into a prime (61881451) 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, 10313574 + ... + 10313579.

It is an arithmetic number, because the mean of its divisors is an integer number (20627154).

Almost surely, 2^61881459 is an apocalyptic number.

61881459 is a deficient number, since it is larger than the sum of its proper divisors (20627157).

61881459 is a wasteful number, since it uses less digits than its factorization.

61881459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20627156.

The product of its digits is 69120, while the sum is 42.

The square root of 61881459 is about 7866.4769115532. The cubic root of 61881459 is about 395.5367567965.

The spelling of 61881459 in words is "sixty-one million, eight hundred eighty-one thousand, four hundred fifty-nine".