645180800726630 has 384 divisors, whose sum is σ = 1458736791552000. Its totient is φ = 204194897996544.

The previous prime is 645180800726629. The next prime is 645180800726639. The reversal of 645180800726630 is 36627008081546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645180800726639) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 100385993477 + ... + 100385999903.

It is an arithmetic number, because the mean of its divisors is an integer number (3798793728000).

Almost surely, 2^{645180800726630} is an apocalyptic number.

645180800726630 is an abundant number, since it is smaller than the sum of its proper divisors (813555990825370).

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

645180800726630 is a wasteful number, since it uses less digits than its factorization.

645180800726630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7496 (or 7489 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 645180800726630 in words is "six hundred forty-five trillion, one hundred eighty billion, eight hundred million, seven hundred twenty-six thousand, six hundred thirty".