645061023346 has 16 divisors (see below), whose sum is σ = 990746011008. Its totient is φ = 314900560800.

The previous prime is 645061023329. The next prime is 645061023349. The reversal of 645061023346 is 643320160546.

It is a happy number.

It is a super-2 number, since 2×645061023346² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645061023299 and 645061023308.

It is not an unprimeable number, because it can be changed into a prime (645061023349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22037235 + ... + 22066486.

It is an arithmetic number, because the mean of its divisors is an integer number (61921625688).

Almost surely, 2^645061023346 is an apocalyptic number.

645061023346 is a deficient number, since it is larger than the sum of its proper divisors (345684987662).

645061023346 is a wasteful number, since it uses less digits than its factorization.

645061023346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44103897.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 645061023346 in words is "six hundred forty-five billion, sixty-one million, twenty-three thousand, three hundred forty-six".