64898765 has 8 divisors (see below), whose sum is σ = 79348248. Its totient is φ = 50939200.

The previous prime is 64898749. The next prime is 64898767. The reversal of 64898765 is 56789846.

It can be written as a sum of positive squares in 4 ways, for example, as 2630884 + 62267881 = 1622^2 + 7891^2 .

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

It is not a de Polignac number, because 64898765 - 2⁴ = 64898749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64898767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122186 + ... + 122715.

It is an arithmetic number, because the mean of its divisors is an integer number (9918531).

Almost surely, 2^64898765 is an apocalyptic number.

It is an amenable number.

64898765 is a deficient number, since it is larger than the sum of its proper divisors (14449483).

64898765 is a wasteful number, since it uses less digits than its factorization.

64898765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244959.

The product of its digits is 2903040, while the sum is 53.

The square root of 64898765 is about 8055.9769736513. The cubic root of 64898765 is about 401.8637298740.

The spelling of 64898765 in words is "sixty-four million, eight hundred ninety-eight thousand, seven hundred sixty-five".