64621582419 has 4 divisors (see below), whose sum is σ = 86162109896. Its totient is φ = 43081054944.

The previous prime is 64621582409. The next prime is 64621582427. The reversal of 64621582419 is 91428512646.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64621582419 - 2⁵ = 64621582387 is a prime.

It is a super-2 number, since 2×64621582419² (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 (64621582409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10770263734 + ... + 10770263739.

It is an arithmetic number, because the mean of its divisors is an integer number (21540527474).

Almost surely, 2^64621582419 is an apocalyptic number.

64621582419 is a deficient number, since it is larger than the sum of its proper divisors (21540527477).

64621582419 is a wasteful number, since it uses less digits than its factorization.

64621582419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21540527476.

The product of its digits is 829440, while the sum is 48.

The spelling of 64621582419 in words is "sixty-four billion, six hundred twenty-one million, five hundred eighty-two thousand, four hundred nineteen".