1641015243 has 24 divisors (see below), whose sum is σ = 2764268000. Its totient is φ = 937721232.

The previous prime is 1641015239. The next prime is 1641015263. The reversal of 1641015243 is 3425101461.

It is a happy number.

1641015243 is a `hidden beast` number, since 1 + 6 + 410 + 1 + 5 + 243 = 666.

It is not a de Polignac number, because 1641015243 - 2² = 1641015239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641015223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262708 + ... + 268881.

Almost surely, 2^1641015243 is an apocalyptic number.

1641015243 is a deficient number, since it is larger than the sum of its proper divisors (1123252757).

1641015243 is an equidigital number, since it uses as much as digits as its factorization.

1641015243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531616 (or 531599 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1641015243 is about 40509.4463427976. The cubic root of 1641015243 is about 1179.5170011667.

The spelling of 1641015243 in words is "one billion, six hundred forty-one million, fifteen thousand, two hundred forty-three".