645346137627 has 40 divisors (see below), whose sum is σ = 965593474560. Its totient is φ = 429536202480.

The previous prime is 645346137599. The next prime is 645346137641. The reversal of 645346137627 is 726731643546.

645346137627 is a `hidden beast` number, since 6 + 4 + 5 + 3 + 4 + 6 + 1 + 3 + 7 + 627 = 666.

It is not a de Polignac number, because 645346137627 - 2⁶ = 645346137563 is a prime.

It is a super-2 number, since 2×645346137627² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645346137647) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 194438274 + ... + 194441592.

It is an arithmetic number, because the mean of its divisors is an integer number (24139836864).

Almost surely, 2^645346137627 is an apocalyptic number.

645346137627 is a deficient number, since it is larger than the sum of its proper divisors (320247336933).

645346137627 is a wasteful number, since it uses less digits than its factorization.

645346137627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6485 (or 6476 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 54.

The spelling of 645346137627 in words is "six hundred forty-five billion, three hundred forty-six million, one hundred thirty-seven thousand, six hundred twenty-seven".