64486242491 has 16 divisors (see below), whose sum is σ = 70475961600. Its totient is φ = 58517865120.

The previous prime is 64486242481. The next prime is 64486242533. The reversal of 64486242491 is 19424268446.

It is not a de Polignac number, because 64486242491 - 2¹⁸ = 64485980347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64486242461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19545560 + ... + 19548858.

It is an arithmetic number, because the mean of its divisors is an integer number (4404747600).

Almost surely, 2^64486242491 is an apocalyptic number.

64486242491 is a deficient number, since it is larger than the sum of its proper divisors (5989719109).

64486242491 is a wasteful number, since it uses less digits than its factorization.

64486242491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5986.

The product of its digits is 2654208, while the sum is 50.

The spelling of 64486242491 in words is "sixty-four billion, four hundred eighty-six million, two hundred forty-two thousand, four hundred ninety-one".