64051978 has 8 divisors (see below), whose sum is σ = 97029540. Its totient is φ = 31708800.

The previous prime is 64051973. The next prime is 64052047. The reversal of 64051978 is 87915046.

64051978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 64048009 + 3969 = 8003^2 + 63^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 64051978.

It is not an unprimeable number, because it can be changed into a prime (64051973) by changing a digit.

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, 158343 + ... + 158746.

Almost surely, 2^64051978 is an apocalyptic number.

64051978 is a deficient number, since it is larger than the sum of its proper divisors (32977562).

64051978 is a wasteful number, since it uses less digits than its factorization.

64051978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317192.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 64051978 is about 8003.2479656699. The cubic root of 64051978 is about 400.1082581978.

The spelling of 64051978 in words is "sixty-four million, fifty-one thousand, nine hundred seventy-eight".