645260102 has 32 divisors (see below), whose sum is σ = 1062727680. Its totient is φ = 292688640.

The previous prime is 645260081. The next prime is 645260117. The reversal of 645260102 is 201062546.

It is a congruent number.

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, 111443 + ... + 117089.

It is an arithmetic number, because the mean of its divisors is an integer number (33210240).

Almost surely, 2^645260102 is an apocalyptic number.

645260102 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

645260102 is a deficient number, since it is larger than the sum of its proper divisors (417467578).

645260102 is a wasteful number, since it uses less digits than its factorization.

645260102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 645260102 is about 25401.9704353816. The cubic root of 645260102 is about 864.1283843785.

The spelling of 645260102 in words is "six hundred forty-five million, two hundred sixty thousand, one hundred two".