351620636645 has 8 divisors (see below), whose sum is σ = 422322518904. Its totient is φ = 281044672704.

The previous prime is 351620636621. The next prime is 351620636657. The reversal of 351620636645 is 546636026153.

It can be written as a sum of positive squares in 4 ways, for example, as 32170727044 + 319449909601 = 179362^2 + 565199^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 351620636645 - 2³⁴ = 334440767461 is a prime.

It is a super-2 number, since 2×351620636645² (a number of 24 digits) contains 22 as substring.

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 351620636645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31473434 + ... + 31484603.

It is an arithmetic number, because the mean of its divisors is an integer number (52790314863).

Almost surely, 2^351620636645 is an apocalyptic number.

It is an amenable number.

351620636645 is a deficient number, since it is larger than the sum of its proper divisors (70701882259).

351620636645 is a wasteful number, since it uses less digits than its factorization.

351620636645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62959159.

The product of its (nonzero) digits is 2332800, while the sum is 47.

The spelling of 351620636645 in words is "three hundred fifty-one billion, six hundred twenty million, six hundred thirty-six thousand, six hundred forty-five".