64971400669 has 48 divisors (see below), whose sum is σ = 79237928448. Its totient is φ = 52117632000.

The previous prime is 64971400639. The next prime is 64971400673. The reversal of 64971400669 is 96600417946.

It is not a de Polignac number, because 64971400669 - 2⁹ = 64971400157 is a prime.

It is a super-2 number, since 2×64971400669² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64971400609) 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 47 ways as a sum of consecutive naturals, for example, 231214809 + ... + 231215089.

It is an arithmetic number, because the mean of its divisors is an integer number (1650790176).

Almost surely, 2^64971400669 is an apocalyptic number.

It is an amenable number.

64971400669 is a deficient number, since it is larger than the sum of its proper divisors (14266527779).

64971400669 is an equidigital number, since it uses as much as digits as its factorization.

64971400669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 64971400669 in words is "sixty-four billion, nine hundred seventy-one million, four hundred thousand, six hundred sixty-nine".