645434569077 has 8 divisors (see below), whose sum is σ = 864658001760. Its totient is φ = 428250424560.

The previous prime is 645434569037. The next prime is 645434569081. The reversal of 645434569077 is 770965434546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 645434569077 - 2¹⁶ = 645434503541 is a prime.

It is a super-2 number, since 2×645434569077² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645434569077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645434569037) 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, 509821302 + ... + 509822567.

It is an arithmetic number, because the mean of its divisors is an integer number (108082250220).

Almost surely, 2^645434569077 is an apocalyptic number.

It is an amenable number.

645434569077 is a deficient number, since it is larger than the sum of its proper divisors (219223432683).

645434569077 is a wasteful number, since it uses less digits than its factorization.

645434569077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019644083.

The product of its (nonzero) digits is 76204800, while the sum is 60.

The spelling of 645434569077 in words is "six hundred forty-five billion, four hundred thirty-four million, five hundred sixty-nine thousand, seventy-seven".