61281878 has 16 divisors (see below), whose sum is σ = 110584320. Its totient is φ = 24881256.

The previous prime is 61281877. The next prime is 61281911. The reversal of 61281878 is 87818216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61281877) 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, 114926 + ... + 115457.

It is an arithmetic number, because the mean of its divisors is an integer number (6911520).

Almost surely, 2^61281878 is an apocalyptic number.

61281878 is a deficient number, since it is larger than the sum of its proper divisors (49302442).

61281878 is a wasteful number, since it uses less digits than its factorization.

61281878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230411.

The product of its digits is 43008, while the sum is 41.

The square root of 61281878 is about 7828.2742670400. The cubic root of 61281878 is about 394.2551320660.

The spelling of 61281878 in words is "sixty-one million, two hundred eighty-one thousand, eight hundred seventy-eight".