64269109840 has 40 divisors (see below), whose sum is σ = 160919966088. Its totient is φ = 23730132480.

The previous prime is 64269109837. The next prime is 64269109897. The reversal of 64269109840 is 4890196246.

It can be written as a sum of positive squares in 4 ways, for example, as 2798833216 + 61470276624 = 52904^2 + 247932^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30897571 + ... + 30899650.

Almost surely, 2^64269109840 is an apocalyptic number.

It is an amenable number.

64269109840 is an abundant number, since it is smaller than the sum of its proper divisors (96650856248).

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

64269109840 is a wasteful number, since it uses less digits than its factorization.

64269109840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61797247 (or 61797241 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 64269109840 in words is "sixty-four billion, two hundred sixty-nine million, one hundred nine thousand, eight hundred forty".