641156652 has 18 divisors (see below), whose sum is σ = 1620701628. Its totient is φ = 213718872.

The previous prime is 641156651. The next prime is 641156669. The reversal of 641156652 is 256651146.

641156652 is a `hidden beast` number, since 6 + 41 + 1 + 566 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×641156652² = 822163704807698208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 17809907 = 641156652 / (6 + 4 + 1 + 1 + 5 + 6 + 6 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (641156651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8904918 + ... + 8904989.

Almost surely, 2^641156652 is an apocalyptic number.

It is an amenable number.

641156652 is an abundant number, since it is smaller than the sum of its proper divisors (979544976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641156652 is a wasteful number, since it uses less digits than its factorization.

641156652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17809917 (or 17809912 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 641156652 is about 25321.0713043505. The cubic root of 641156652 is about 862.2927159090.

The spelling of 641156652 in words is "six hundred forty-one million, one hundred fifty-six thousand, six hundred fifty-two".