645415045642 has 8 divisors (see below), whose sum is σ = 999352328832. Its totient is φ = 312297602700.

The previous prime is 645415045637. The next prime is 645415045687. The reversal of 645415045642 is 246540514546.

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

It is a super-2 number, since 2×645415045642² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645415045592 and 645415045601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5204959984 + ... + 5204960107.

It is an arithmetic number, because the mean of its divisors is an integer number (124919041104).

Almost surely, 2^645415045642 is an apocalyptic number.

645415045642 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

645415045642 is a deficient number, since it is larger than the sum of its proper divisors (353937283190).

645415045642 is a wasteful number, since it uses less digits than its factorization.

645415045642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10409920124.

The product of its (nonzero) digits is 2304000, while the sum is 46.

The spelling of 645415045642 in words is "six hundred forty-five billion, four hundred fifteen million, forty-five thousand, six hundred forty-two".