641263117 has 8 divisors (see below), whose sum is σ = 722126592. Its totient is φ = 564160800.

The previous prime is 641263111. The next prime is 641263121. The reversal of 641263117 is 711362146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641263117 is a prime.

It is a super-2 number, since 2×641263117² = 822436770449111378, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641263111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939928 + ... + 940609.

It is an arithmetic number, because the mean of its divisors is an integer number (90265824).

Almost surely, 2^641263117 is an apocalyptic number.

It is an amenable number.

641263117 is a deficient number, since it is larger than the sum of its proper divisors (80863475).

641263117 is a wasteful number, since it uses less digits than its factorization.

641263117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880579.

The product of its digits is 6048, while the sum is 31.

The square root of 641263117 is about 25323.1735175511. The cubic root of 641263117 is about 862.3404415898.

The spelling of 641263117 in words is "six hundred forty-one million, two hundred sixty-three thousand, one hundred seventeen".