61161278 has 8 divisors (see below), whose sum is σ = 95730768. Its totient is φ = 29251024.

The previous prime is 61161271. The next prime is 61161281. The reversal of 61161278 is 87216116.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61161271) 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 3 ways as a sum of consecutive naturals, for example, 664751 + ... + 664842.

It is an arithmetic number, because the mean of its divisors is an integer number (11966346).

Almost surely, 2^61161278 is an apocalyptic number.

61161278 is a deficient number, since it is larger than the sum of its proper divisors (34569490).

61161278 is a wasteful number, since it uses less digits than its factorization.

61161278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329618.

The product of its digits is 4032, while the sum is 32.

The square root of 61161278 is about 7820.5676264578. The cubic root of 61161278 is about 393.9963367263.

The spelling of 61161278 in words is "sixty-one million, one hundred sixty-one thousand, two hundred seventy-eight".