61432778 has 8 divisors (see below), whose sum is σ = 100526400. Its totient is φ = 27923980.

The previous prime is 61432771. The next prime is 61432829. The reversal of 61432778 is 87723416.

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

It is not an unprimeable number, because it can be changed into a prime (61432771) 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, 1396178 + ... + 1396221.

It is an arithmetic number, because the mean of its divisors is an integer number (12565800).

Almost surely, 2^61432778 is an apocalyptic number.

61432778 is a deficient number, since it is larger than the sum of its proper divisors (39093622).

61432778 is a wasteful number, since it uses less digits than its factorization.

61432778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792412.

The product of its digits is 56448, while the sum is 38.

The square root of 61432778 is about 7837.9064806873. The cubic root of 61432778 is about 394.5784703638.

The spelling of 61432778 in words is "sixty-one million, four hundred thirty-two thousand, seven hundred seventy-eight".