64888847491 has 16 divisors (see below), whose sum is σ = 70353597888. Its totient is φ = 59492275200.

The previous prime is 64888847483. The next prime is 64888847503. The reversal of 64888847491 is 19474888846.

It is a cyclic number.

It is not a de Polignac number, because 64888847491 - 2³ = 64888847483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64888847411) 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, 2943751 + ... + 2965711.

It is an arithmetic number, because the mean of its divisors is an integer number (4397099868).

Almost surely, 2^64888847491 is an apocalyptic number.

64888847491 is a deficient number, since it is larger than the sum of its proper divisors (5464750397).

64888847491 is a wasteful number, since it uses less digits than its factorization.

64888847491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23502.

The product of its digits is 99090432, while the sum is 67.

The spelling of 64888847491 in words is "sixty-four billion, eight hundred eighty-eight million, eight hundred forty-seven thousand, four hundred ninety-one".