641155073 has 12 divisors (see below), whose sum is σ = 703071360. Its totient is φ = 584331696.

The previous prime is 641155043. The next prime is 641155087. The reversal of 641155073 is 370551146.

It is not a de Polignac number, because 641155073 - 2¹⁸ = 640892929 is a prime.

It is a super-2 number, since 2×641155073² = 822159655267270658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641155043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10661 + ... + 37362.

It is an arithmetic number, because the mean of its divisors is an integer number (58589280).

Almost surely, 2^641155073 is an apocalyptic number.

It is an amenable number.

641155073 is a deficient number, since it is larger than the sum of its proper divisors (61916287).

641155073 is a wasteful number, since it uses less digits than its factorization.

641155073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48128 (or 48115 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 641155073 is about 25321.0401247658. The cubic root of 641155073 is about 862.2920080418.

The spelling of 641155073 in words is "six hundred forty-one million, one hundred fifty-five thousand, seventy-three".