64719868801 has 9 divisors (see below), whose sum is σ = 75288449601. Its totient is φ = 55472646852.

The previous prime is 64719868789. The next prime is 64719868883. The reversal of 64719868801 is 10886891746.

The square root of 64719868801 is 254401.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 64719868801 - 2²¹ = 64717771649 is a prime.

It is a super-2 number, since 2×64719868801² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64719868001) 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 8 ways as a sum of consecutive naturals, for example, 1762636 + ... + 1798978.

It is an arithmetic number, because the mean of its divisors is an integer number (8365383289).

Almost surely, 2^64719868801 is an apocalyptic number.

64719868801 is the 254401-st square number.

64719868801 is the 127201-st centered octagonal number.

It is an amenable number.

64719868801 is a deficient number, since it is larger than the sum of its proper divisors (10568580800).

64719868801 is an frugal number, since it uses more digits than its factorization.

64719868801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72700 (or 36350 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 64719868801 in words is "sixty-four billion, seven hundred nineteen million, eight hundred sixty-eight thousand, eight hundred one".