64191146381 has 8 divisors (see below), whose sum is σ = 64699259328. Its totient is φ = 63683308000.

The previous prime is 64191146377. The next prime is 64191146401. The reversal of 64191146381 is 18364119146.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64191146381 - 2² = 64191146377 is a prime.

It is a super-2 number, since 2×64191146381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64191146881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414161 + ... + 547641.

It is an arithmetic number, because the mean of its divisors is an integer number (8087407416).

Almost surely, 2^64191146381 is an apocalyptic number.

It is an amenable number.

64191146381 is a deficient number, since it is larger than the sum of its proper divisors (508112947).

64191146381 is a wasteful number, since it uses less digits than its factorization.

64191146381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137283.

The product of its digits is 124416, while the sum is 44.

The spelling of 64191146381 in words is "sixty-four billion, one hundred ninety-one million, one hundred forty-six thousand, three hundred eighty-one".