640461226246 has 16 divisors (see below), whose sum is σ = 983146342464. Its totient is φ = 312747488424.

The previous prime is 640461226211. The next prime is 640461226291. The reversal of 640461226246 is 642622164046.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334065 + ... + 1180051.

It is an arithmetic number, because the mean of its divisors is an integer number (61446646404).

Almost surely, 2^640461226246 is an apocalyptic number.

640461226246 is a deficient number, since it is larger than the sum of its proper divisors (342685116218).

640461226246 is a wasteful number, since it uses less digits than its factorization.

640461226246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854835.

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 640461226246 in words is "six hundred forty billion, four hundred sixty-one million, two hundred twenty-six thousand, two hundred forty-six".