640413285435 has 96 divisors (see below), whose sum is σ = 1407415426560. Its totient is φ = 261634752000.

The previous prime is 640413285419. The next prime is 640413285437. The reversal of 640413285435 is 534582314046.

640413285435 is a `hidden beast` number, since 6 + 4 + 0 + 4 + 132 + 85 + 435 = 666.

It is not a de Polignac number, because 640413285435 - 2⁴ = 640413285419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (640413285437) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1361866 + ... + 1770735.

It is an arithmetic number, because the mean of its divisors is an integer number (14660577360).

Almost surely, 2^640413285435 is an apocalyptic number.

640413285435 is an abundant number, since it is smaller than the sum of its proper divisors (767002141125).

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

640413285435 is a wasteful number, since it uses less digits than its factorization.

640413285435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132689 (or 3132686 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 640413285435 in words is "six hundred forty billion, four hundred thirteen million, two hundred eighty-five thousand, four hundred thirty-five".