64540852340 has 24 divisors (see below), whose sum is σ = 136877732712. Its totient is φ = 25560732800.

The previous prime is 64540852333. The next prime is 64540852457. The reversal of 64540852340 is 4325804546.

64540852340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7732036624 + 56808815716 = 87932^2 + 238346^2 .

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, 15973439 + ... + 15977478.

It is an arithmetic number, because the mean of its divisors is an integer number (5703238863).

Almost surely, 2^64540852340 is an apocalyptic number.

It is an amenable number.

64540852340 is an abundant number, since it is smaller than the sum of its proper divisors (72336880372).

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

64540852340 is a wasteful number, since it uses less digits than its factorization.

64540852340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31951027 (or 31951025 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 41.

The spelling of 64540852340 in words is "sixty-four billion, five hundred forty million, eight hundred fifty-two thousand, three hundred forty".