1640797048454 has 16 divisors (see below), whose sum is σ = 2502018312192. Its totient is φ = 806879593608.

The previous prime is 1640797048421. The next prime is 1640797048483. The reversal of 1640797048454 is 4548407970461.

It is a junction number, because it is equal to n+sod(n) for n = 1640797048393 and 1640797048402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22125134 + ... + 22199169.

It is an arithmetic number, because the mean of its divisors is an integer number (156376144512).

Almost surely, 2^{1640797048454} is an apocalyptic number.

1640797048454 is a deficient number, since it is larger than the sum of its proper divisors (861221263738).

1640797048454 is a wasteful number, since it uses less digits than its factorization.

1640797048454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44324611.

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 1640797048454 in words is "one trillion, six hundred forty billion, seven hundred ninety-seven million, forty-eight thousand, four hundred fifty-four".