1642478841 has 6 divisors (see below), whose sum is σ = 2372469450. Its totient is φ = 1094985888.

The previous prime is 1642478839. The next prime is 1642478857. The reversal of 1642478841 is 1488742461.

It can be written as a sum of positive squares in only one way, i.e., 1258475625 + 384003216 = 35475^2 + 19596^2 .

It is not a de Polignac number, because 1642478841 - 2¹ = 1642478839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1642478881) 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, 91248816 + ... + 91248833.

It is an arithmetic number, because the mean of its divisors is an integer number (395411575).

Almost surely, 2^1642478841 is an apocalyptic number.

It is an amenable number.

1642478841 is a deficient number, since it is larger than the sum of its proper divisors (729990609).

1642478841 is a wasteful number, since it uses less digits than its factorization.

1642478841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182497655 (or 182497652 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 1642478841 is about 40527.5072142366. The cubic root of 1642478841 is about 1179.8675617426.

The spelling of 1642478841 in words is "one billion, six hundred forty-two million, four hundred seventy-eight thousand, eight hundred forty-one".