64246794981 has 8 divisors (see below), whose sum is σ = 86510536224. Its totient is φ = 42407125200.

The previous prime is 64246794971. The next prime is 64246795001. The reversal of 64246794981 is 18949764246.

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

It is not a de Polignac number, because 64246794981 - 2⁷ = 64246794853 is a prime.

It is a super-2 number, since 2×64246794981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64246794971) 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, 106017511 + ... + 106018116.

It is an arithmetic number, because the mean of its divisors is an integer number (10813817028).

Almost surely, 2^64246794981 is an apocalyptic number.

It is an amenable number.

64246794981 is a deficient number, since it is larger than the sum of its proper divisors (22263741243).

64246794981 is a wasteful number, since it uses less digits than its factorization.

64246794981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212035731.

The product of its digits is 20901888, while the sum is 60.

The spelling of 64246794981 in words is "sixty-four billion, two hundred forty-six million, seven hundred ninety-four thousand, nine hundred eighty-one".