64631373074140 has 12 divisors (see below), whose sum is σ = 135725883455736. Its totient is φ = 25852549229648.

The previous prime is 64631373074129. The next prime is 64631373074141. The reversal of 64631373074140 is 4147037313646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64631373074141) 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, 1615784326834 + ... + 1615784326873.

It is an arithmetic number, because the mean of its divisors is an integer number (11310490287978).

Almost surely, 2^{64631373074140} is an apocalyptic number.

It is an amenable number.

64631373074140 is an abundant number, since it is smaller than the sum of its proper divisors (71094510381596).

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

64631373074140 is a wasteful number, since it uses less digits than its factorization.

64631373074140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231568653716 (or 3231568653714 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 49.

The spelling of 64631373074140 in words is "sixty-four trillion, six hundred thirty-one billion, three hundred seventy-three million, seventy-four thousand, one hundred forty".