1654404634943 has 4 divisors (see below), whose sum is σ = 1677067712208. Its totient is φ = 1631741557680.

The previous prime is 1654404634931. The next prime is 1654404634991. The reversal of 1654404634943 is 3494364044561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1654404634943 is a prime.

It is a super-2 number, since 2×1654404634943² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1654404634643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11331538523 + ... + 11331538668.

It is an arithmetic number, because the mean of its divisors is an integer number (419266928052).

Almost surely, 2^{1654404634943} is an apocalyptic number.

1654404634943 is a deficient number, since it is larger than the sum of its proper divisors (22663077265).

1654404634943 is an equidigital number, since it uses as much as digits as its factorization.

1654404634943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22663077264.

The product of its (nonzero) digits is 14929920, while the sum is 53.

The spelling of 1654404634943 in words is "one trillion, six hundred fifty-four billion, four hundred four million, six hundred thirty-four thousand, nine hundred forty-three".