635633243345 has 16 divisors (see below), whose sum is σ = 807675511248. Its totient is φ = 478566359040.

The previous prime is 635633243341. The next prime is 635633243381. The reversal of 635633243345 is 543342336536.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 55877395456 + 579755847889 = 236384^2 + 761417^2 .

It is not a de Polignac number, because 635633243345 - 2² = 635633243341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 635633243345.

It is not an unprimeable number, because it can be changed into a prime (635633243341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1299167 + ... + 1720203.

It is an arithmetic number, because the mean of its divisors is an integer number (50479719453).

Almost surely, 2^635633243345 is an apocalyptic number.

It is an amenable number.

635633243345 is a deficient number, since it is larger than the sum of its proper divisors (172042267903).

635633243345 is a wasteful number, since it uses less digits than its factorization.

635633243345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438820.

The product of its digits is 6998400, while the sum is 47.

The spelling of 635633243345 in words is "six hundred thirty-five billion, six hundred thirty-three million, two hundred forty-three thousand, three hundred forty-five".