640310435413465 has 16 divisors (see below), whose sum is σ = 772399732930560. Its totient is φ = 509563571359680.

The previous prime is 640310435413381. The next prime is 640310435413469. The reversal of 640310435413465 is 564314534013046.

It is not a de Polignac number, because 640310435413465 - 2¹⁷ = 640310435282393 is a prime.

It is a super-2 number, since 2×640310435413465² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (640310435413469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178103047 + ... + 181662643.

It is an arithmetic number, because the mean of its divisors is an integer number (48274983308160).

Almost surely, 2^{640310435413465} is an apocalyptic number.

It is an amenable number.

640310435413465 is a deficient number, since it is larger than the sum of its proper divisors (132089297517095).

640310435413465 is a wasteful number, since it uses less digits than its factorization.

640310435413465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748152.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 640310435413465 in words is "six hundred forty trillion, three hundred ten billion, four hundred thirty-five million, four hundred thirteen thousand, four hundred sixty-five".