64511231423020 has 24 divisors (see below), whose sum is σ = 135474182023824. Its totient is φ = 25804379038656.

The previous prime is 64511231422961. The next prime is 64511231423033. The reversal of 64511231423020 is 2032413211546.

It is an unprimeable number.

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, 2359074 + ... + 11601193.

It is an arithmetic number, because the mean of its divisors is an integer number (5644757584326).

Almost surely, 2^{64511231423020} is an apocalyptic number.

It is an amenable number.

64511231423020 is an abundant number, since it is smaller than the sum of its proper divisors (70962950600804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64511231423020 is a wasteful number, since it uses less digits than its factorization.

64511231423020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14191329 (or 14191327 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 64511231423020 its reverse (2032413211546), we get a palindrome (66543644634566).

The spelling of 64511231423020 in words is "sixty-four trillion, five hundred eleven billion, two hundred thirty-one million, four hundred twenty-three thousand, twenty".