64509262040 has 32 divisors (see below), whose sum is σ = 145284300000. Its totient is φ = 25779089664.

The previous prime is 64509262039. The next prime is 64509262087. The reversal of 64509262040 is 4026290546.

It is a super-2 number, since 2×64509262040² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64509261985 and 64509262003.

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, 726740 + ... + 810659.

It is an arithmetic number, because the mean of its divisors is an integer number (4540134375).

Almost surely, 2^64509262040 is an apocalyptic number.

It is an amenable number.

64509262040 is an abundant number, since it is smaller than the sum of its proper divisors (80775037960).

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

64509262040 is a wasteful number, since it uses less digits than its factorization.

64509262040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538459 (or 1538455 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 64509262040 in words is "sixty-four billion, five hundred nine million, two hundred sixty-two thousand, forty".