646072355 has 8 divisors (see below), whose sum is σ = 796240752. Its totient is φ = 502888608.

The previous prime is 646072331. The next prime is 646072363. The reversal of 646072355 is 553270646.

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

It is not a de Polignac number, because 646072355 - 2¹² = 646068259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1745957 + ... + 1746326.

It is an arithmetic number, because the mean of its divisors is an integer number (99530094).

Almost surely, 2^646072355 is an apocalyptic number.

646072355 is a deficient number, since it is larger than the sum of its proper divisors (150168397).

646072355 is a wasteful number, since it uses less digits than its factorization.

646072355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492325.

The product of its (nonzero) digits is 151200, while the sum is 38.

The square root of 646072355 is about 25417.9533991232. The cubic root of 646072355 is about 864.4908204272.

The spelling of 646072355 in words is "six hundred forty-six million, seventy-two thousand, three hundred fifty-five".