64141977994 has 8 divisors (see below), whose sum is σ = 96475128768. Its totient is φ = 31983601740.

The previous prime is 64141977941. The next prime is 64141977997. The reversal of 64141977994 is 49977914146.

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

It is a super-2 number, since 2×64141977994² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64141977997) 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, 43692712 + ... + 43694179.

It is an arithmetic number, because the mean of its divisors is an integer number (12059391096).

Almost surely, 2^64141977994 is an apocalyptic number.

64141977994 is a deficient number, since it is larger than the sum of its proper divisors (32333150774).

64141977994 is a wasteful number, since it uses less digits than its factorization.

64141977994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87387260.

The product of its digits is 13716864, while the sum is 61.

The spelling of 64141977994 in words is "sixty-four billion, one hundred forty-one million, nine hundred seventy-seven thousand, nine hundred ninety-four".