355720945697 has 8 divisors (see below), whose sum is σ = 383107659816. Its totient is φ = 328337597952.

The previous prime is 355720945667. The next prime is 355720945709. The reversal of 355720945697 is 796549027553.

It can be written as a sum of positive squares in 4 ways, for example, as 30500526736 + 325220418961 = 174644^2 + 570281^2 .

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

It is not a de Polignac number, because 355720945697 - 2⁸ = 355720945441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355720945667) by changing a digit.

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, 619958 + ... + 1046799.

It is an arithmetic number, because the mean of its divisors is an integer number (47888457477).

Almost surely, 2^355720945697 is an apocalyptic number.

It is an amenable number.

355720945697 is a deficient number, since it is larger than the sum of its proper divisors (27386714119).

355720945697 is a wasteful number, since it uses less digits than its factorization.

355720945697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683187.

The product of its (nonzero) digits is 71442000, while the sum is 62.

The spelling of 355720945697 in words is "three hundred fifty-five billion, seven hundred twenty million, nine hundred forty-five thousand, six hundred ninety-seven".