642361195 has 32 divisors (see below), whose sum is σ = 891191808. Its totient is φ = 435395328.

The previous prime is 642361193. The next prime is 642361243. The reversal of 642361195 is 591163246.

It is a cyclic number.

It is not a de Polignac number, because 642361195 - 2¹ = 642361193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642361193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1851012 + ... + 1851358.

It is an arithmetic number, because the mean of its divisors is an integer number (27849744).

Almost surely, 2^642361195 is an apocalyptic number.

642361195 is a deficient number, since it is larger than the sum of its proper divisors (248830613).

642361195 is a wasteful number, since it uses less digits than its factorization.

642361195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819.

The product of its digits is 38880, while the sum is 37.

The square root of 642361195 is about 25344.8455311923. The cubic root of 642361195 is about 862.8323754341.

The spelling of 642361195 in words is "six hundred forty-two million, three hundred sixty-one thousand, one hundred ninety-five".