1642955867 has 16 divisors (see below), whose sum is σ = 1904163072. Its totient is φ = 1388443680.

The previous prime is 1642955819. The next prime is 1642955917. The reversal of 1642955867 is 7685592461.

It is a cyclic number.

It is not a de Polignac number, because 1642955867 - 2²⁴ = 1626178651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1642952867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311708 + ... + 316934.

It is an arithmetic number, because the mean of its divisors is an integer number (119010192).

Almost surely, 2^1642955867 is an apocalyptic number.

1642955867 is a deficient number, since it is larger than the sum of its proper divisors (261207205).

1642955867 is an equidigital number, since it uses as much as digits as its factorization.

1642955867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5858.

The product of its digits is 3628800, while the sum is 53.

The square root of 1642955867 is about 40533.3919996834. The cubic root of 1642955867 is about 1179.9817738734.

The spelling of 1642955867 in words is "one billion, six hundred forty-two million, nine hundred fifty-five thousand, eight hundred sixty-seven".