645105140460 has 96 divisors (see below), whose sum is σ = 2189447769600. Its totient is φ = 156389123520.

The previous prime is 645105140437. The next prime is 645105140467. The reversal of 645105140460 is 64041501546.

645105140460 is a `hidden beast` number, since 6 + 4 + 51 + 0 + 5 + 140 + 460 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (645105140467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54295840 + ... + 54307719.

It is an arithmetic number, because the mean of its divisors is an integer number (22806747600).

Almost surely, 2^645105140460 is an apocalyptic number.

645105140460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645105140460 is an abundant number, since it is smaller than the sum of its proper divisors (1544342629140).

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

645105140460 is a wasteful number, since it uses less digits than its factorization.

645105140460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108603588 (or 108603580 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 645105140460 in words is "six hundred forty-five billion, one hundred five million, one hundred forty thousand, four hundred sixty".