64621345461 has 16 divisors (see below), whose sum is σ = 89590430208. Its totient is φ = 41386867200.

The previous prime is 64621345433. The next prime is 64621345463. The reversal of 64621345461 is 16454312646.

It is not a de Polignac number, because 64621345461 - 2¹⁷ = 64621214389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64621345463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2523220 + ... + 2548701.

It is an arithmetic number, because the mean of its divisors is an integer number (5599401888).

Almost surely, 2^64621345461 is an apocalyptic number.

It is an amenable number.

64621345461 is a deficient number, since it is larger than the sum of its proper divisors (24969084747).

64621345461 is a wasteful number, since it uses less digits than its factorization.

64621345461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072092.

The product of its digits is 414720, while the sum is 42.

The spelling of 64621345461 in words is "sixty-four billion, six hundred twenty-one million, three hundred forty-five thousand, four hundred sixty-one".