64763532240 has 160 divisors (see below), whose sum is σ = 230545958400. Its totient is φ = 14873909760.

The previous prime is 64763532209. The next prime is 64763532277. The reversal of 64763532240 is 4223536746.

It is a junction number, because it is equal to n+sod(n) for n = 64763532192 and 64763532201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 595410 + ... + 695729.

It is an arithmetic number, because the mean of its divisors is an integer number (1440912240).

Almost surely, 2^64763532240 is an apocalyptic number.

64763532240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64763532240 is an abundant number, since it is smaller than the sum of its proper divisors (165782426160).

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

64763532240 is a wasteful number, since it uses less digits than its factorization.

64763532240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291185 (or 1291179 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 64763532240 in words is "sixty-four billion, seven hundred sixty-three million, five hundred thirty-two thousand, two hundred forty".