64490761279 has 8 divisors (see below), whose sum is σ = 75271891968. Its totient is φ = 54101671800.

The previous prime is 64490761253. The next prime is 64490761331. The reversal of 64490761279 is 97216709446.

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

It is not a de Polignac number, because 64490761279 - 2¹⁷ = 64490630207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64490762279) 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, 98009947 + ... + 98010604.

It is an arithmetic number, because the mean of its divisors is an integer number (9408986496).

Almost surely, 2^64490761279 is an apocalyptic number.

64490761279 is a deficient number, since it is larger than the sum of its proper divisors (10781130689).

64490761279 is a wasteful number, since it uses less digits than its factorization.

64490761279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196020605.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 64490761279 in words is "sixty-four billion, four hundred ninety million, seven hundred sixty-one thousand, two hundred seventy-nine".