64312461 has 10 divisors (see below), whose sum is σ = 96071822. Its totient is φ = 42874920.

The previous prime is 64312453. The next prime is 64312463. The reversal of 64312461 is 16421346.

64312461 is a `hidden beast` number, since 643 + 12 + 4 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64304361 + 8100 = 8019^2 + 90^2 .

It is not a de Polignac number, because 64312461 - 2³ = 64312453 is a prime.

It is a super-3 number, since 3×64312461³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64312463) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 396910 + ... + 397071.

Almost surely, 2^64312461 is an apocalyptic number.

It is an amenable number.

64312461 is a deficient number, since it is larger than the sum of its proper divisors (31759361).

64312461 is an equidigital number, since it uses as much as digits as its factorization.

64312461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793993 (or 793984 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 64312461 is about 8019.5050346016. The cubic root of 64312461 is about 400.6499039071.

The spelling of 64312461 in words is "sixty-four million, three hundred twelve thousand, four hundred sixty-one".