61627978 has 16 divisors (see below), whose sum is σ = 94957920. Its totient is φ = 29986000.

The previous prime is 61627967. The next prime is 61627981. The reversal of 61627978 is 87972616.

It is a happy number.

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, 9333 + ... + 14503.

It is an arithmetic number, because the mean of its divisors is an integer number (5934870).

Almost surely, 2^61627978 is an apocalyptic number.

61627978 is a deficient number, since it is larger than the sum of its proper divisors (33329942).

61627978 is a wasteful number, since it uses less digits than its factorization.

61627978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333.

The product of its digits is 254016, while the sum is 46.

The square root of 61627978 is about 7850.3489094435. The cubic root of 61627978 is about 394.9959471891.

The spelling of 61627978 in words is "sixty-one million, six hundred twenty-seven thousand, nine hundred seventy-eight".