64140154044 has 48 divisors (see below), whose sum is σ = 153313872768. Its totient is φ = 20864086848.

The previous prime is 64140154033. The next prime is 64140154069. The reversal of 64140154044 is 44045104146.

It is a super-2 number, since 2×64140154044² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64140153996 and 64140154014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286759 + ... + 458814.

It is an arithmetic number, because the mean of its divisors is an integer number (3194039016).

Almost surely, 2^64140154044 is an apocalyptic number.

It is an amenable number.

64140154044 is an abundant number, since it is smaller than the sum of its proper divisors (89173718724).

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

64140154044 is a wasteful number, since it uses less digits than its factorization.

64140154044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745754 (or 745752 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The spelling of 64140154044 in words is "sixty-four billion, one hundred forty million, one hundred fifty-four thousand, forty-four".