64630956419 has 4 divisors (see below), whose sum is σ = 64632618960. Its totient is φ = 64629293880.

The previous prime is 64630956361. The next prime is 64630956427. The reversal of 64630956419 is 91465903646.

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

It is a cyclic number.

It is not a de Polignac number, because 64630956419 - 2³² = 60335989123 is a prime.

It is a super-2 number, since 2×64630956419² (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 (64630916419) 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, 771527 + ... + 851184.

It is an arithmetic number, because the mean of its divisors is an integer number (16158154740).

Almost surely, 2^64630956419 is an apocalyptic number.

64630956419 is a deficient number, since it is larger than the sum of its proper divisors (1662541).

64630956419 is a wasteful number, since it uses less digits than its factorization.

64630956419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662540.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 64630956419 in words is "sixty-four billion, six hundred thirty million, nine hundred fifty-six thousand, four hundred nineteen".