645088143782 has 4 divisors (see below), whose sum is σ = 967632215676. Its totient is φ = 322544071890.

The previous prime is 645088143757. The next prime is 645088143787. The reversal of 645088143782 is 287341880546.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×645088143782² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645088143787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161272035944 + ... + 161272035947.

It is an arithmetic number, because the mean of its divisors is an integer number (241908053919).

Almost surely, 2^645088143782 is an apocalyptic number.

645088143782 is a deficient number, since it is larger than the sum of its proper divisors (322544071894).

645088143782 is a wasteful number, since it uses less digits than its factorization.

645088143782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322544071893.

The product of its (nonzero) digits is 10321920, while the sum is 56.

The spelling of 645088143782 in words is "six hundred forty-five billion, eighty-eight million, one hundred forty-three thousand, seven hundred eighty-two".