64719798 has 32 divisors (see below), whose sum is σ = 152070912. Its totient is φ = 18103200.

The previous prime is 64719797. The next prime is 64719803. The reversal of 64719798 is 89791746.

It is a self number, because there is not a number n which added to its sum of digits gives 64719798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64719791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36858 + ... + 38573.

It is an arithmetic number, because the mean of its divisors is an integer number (4752216).

Almost surely, 2^64719798 is an apocalyptic number.

64719798 is an abundant number, since it is smaller than the sum of its proper divisors (87351114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64719798 is a wasteful number, since it uses less digits than its factorization.

64719798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75460.

The product of its digits is 762048, while the sum is 51.

The square root of 64719798 is about 8044.8615898597. The cubic root of 64719798 is about 401.4939921879.

The spelling of 64719798 in words is "sixty-four million, seven hundred nineteen thousand, seven hundred ninety-eight".