1640554630466 has 8 divisors (see below), whose sum is σ = 2495491550784. Its totient is φ = 808724113540.

The previous prime is 1640554630459. The next prime is 1640554630511. The reversal of 1640554630466 is 6640364550461.

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

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, 5776600670 + ... + 5776600953.

It is an arithmetic number, because the mean of its divisors is an integer number (311936443848).

Almost surely, 2^{1640554630466} is an apocalyptic number.

1640554630466 is a deficient number, since it is larger than the sum of its proper divisors (854936920318).

1640554630466 is a wasteful number, since it uses less digits than its factorization.

1640554630466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11553201696.

The product of its (nonzero) digits is 6220800, while the sum is 50.

The spelling of 1640554630466 in words is "one trillion, six hundred forty billion, five hundred fifty-four million, six hundred thirty thousand, four hundred sixty-six".