61946978 has 8 divisors (see below), whose sum is σ = 92966400. Its totient is φ = 30958180.

The previous prime is 61946957. The next prime is 61946999. The reversal of 61946978 is 87964916.

61946978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61946957) and next prime (61946999).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658 + ... + 11253.

It is an arithmetic number, because the mean of its divisors is an integer number (11620800).

Almost surely, 2^61946978 is an apocalyptic number.

61946978 is a deficient number, since it is larger than the sum of its proper divisors (31019422).

61946978 is a wasteful number, since it uses less digits than its factorization.

61946978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15312.

The product of its digits is 653184, while the sum is 50.

The square root of 61946978 is about 7870.6402534991. The cubic root of 61946978 is about 395.6763033446.

The spelling of 61946978 in words is "sixty-one million, nine hundred forty-six thousand, nine hundred seventy-eight".