61278458 has 16 divisors (see below), whose sum is σ = 97848000. Its totient is φ = 28698912.

The previous prime is 61278449. The next prime is 61278461. The reversal of 61278458 is 85487216.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5678 + ... + 12441.

It is an arithmetic number, because the mean of its divisors is an integer number (6115500).

Almost surely, 2^61278458 is an apocalyptic number.

61278458 is a deficient number, since it is larger than the sum of its proper divisors (36569542).

61278458 is a wasteful number, since it uses less digits than its factorization.

61278458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18229.

The product of its digits is 107520, while the sum is 41.

The square root of 61278458 is about 7828.0558250437. The cubic root of 61278458 is about 394.2477977736.

The spelling of 61278458 in words is "sixty-one million, two hundred seventy-eight thousand, four hundred fifty-eight".