645572354 has 24 divisors (see below), whose sum is σ = 1150433280. Its totient is φ = 270785256.

The previous prime is 645572351. The next prime is 645572357. The reversal of 645572354 is 453275546.

It is an interprime number because it is at equal distance from previous prime (645572351) and next prime (645572357).

It is not an unprimeable number, because it can be changed into a prime (645572351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65474 + ... + 74685.

It is an arithmetic number, because the mean of its divisors is an integer number (47934720).

Almost surely, 2^645572354 is an apocalyptic number.

645572354 is a deficient number, since it is larger than the sum of its proper divisors (504860926).

645572354 is a wasteful number, since it uses less digits than its factorization.

645572354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140222 (or 140215 counting only the distinct ones).

The product of its digits is 504000, while the sum is 41.

The square root of 645572354 is about 25408.1159081109. The cubic root of 645572354 is about 864.2677505570.

The spelling of 645572354 in words is "six hundred forty-five million, five hundred seventy-two thousand, three hundred fifty-four".