345443721761042 has 4 divisors (see below), whose sum is σ = 518165582641566. Its totient is φ = 172721860880520.

The previous prime is 345443721760897. The next prime is 345443721761087. The reversal of 345443721761042 is 240167127344543.

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

It can be written as a sum of positive squares in only one way, i.e., 344621687592121 + 822034168921 = 18563989^2 + 906661^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86360930440259 + ... + 86360930440262.

Almost surely, 2^{345443721761042} is an apocalyptic number.

345443721761042 is a deficient number, since it is larger than the sum of its proper divisors (172721860880524).

345443721761042 is a wasteful number, since it uses less digits than its factorization.

345443721761042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172721860880523.

The product of its (nonzero) digits is 13547520, while the sum is 53.

The spelling of 345443721761042 in words is "three hundred forty-five trillion, four hundred forty-three billion, seven hundred twenty-one million, seven hundred sixty-one thousand, forty-two".