340443437621 has 32 divisors (see below), whose sum is σ = 405146235648. Its totient is φ = 280008368640.

The previous prime is 340443437591. The next prime is 340443437627. The reversal of 340443437621 is 126734344043.

It is not a de Polignac number, because 340443437621 - 2¹⁸ = 340443175477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340443437627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15651065 + ... + 15672801.

It is an arithmetic number, because the mean of its divisors is an integer number (12660819864).

Almost surely, 2^340443437621 is an apocalyptic number.

It is an amenable number.

340443437621 is a deficient number, since it is larger than the sum of its proper divisors (64702798027).

340443437621 is a wasteful number, since it uses less digits than its factorization.

340443437621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22701.

The product of its (nonzero) digits is 580608, while the sum is 41.

The spelling of 340443437621 in words is "three hundred forty billion, four hundred forty-three million, four hundred thirty-seven thousand, six hundred twenty-one".