645842010 has 32 divisors (see below), whose sum is σ = 1690932672. Its totient is φ = 156567680.

The previous prime is 645841981. The next prime is 645842039. The reversal of 645842010 is 10248546.

It is an interprime number because it is at equal distance from previous prime (645841981) and next prime (645842039).

It is a super-2 number, since 2×645842010² = 834223803761680200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 978219 + ... + 978878.

It is an arithmetic number, because the mean of its divisors is an integer number (52841646).

Almost surely, 2^645842010 is an apocalyptic number.

645842010 is an abundant number, since it is smaller than the sum of its proper divisors (1045090662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645842010 is a wasteful number, since it uses less digits than its factorization.

645842010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957118.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 645842010 is about 25413.4218475199. The cubic root of 645842010 is about 864.3880688769.

The spelling of 645842010 in words is "six hundred forty-five million, eight hundred forty-two thousand, ten".