425640194 has 8 divisors (see below), whose sum is σ = 729668928. Its totient is φ = 182417220.

The previous prime is 425640167. The next prime is 425640197. The reversal of 425640194 is 491046524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (425640197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15201422 + ... + 15201449.

It is an arithmetic number, because the mean of its divisors is an integer number (91208616).

Almost surely, 2^425640194 is an apocalyptic number.

425640194 is a deficient number, since it is larger than the sum of its proper divisors (304028734).

425640194 is a wasteful number, since it uses less digits than its factorization.

425640194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30402880.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 425640194 is about 20631.0492704564. The cubic root of 425640194 is about 752.2246209653.

The spelling of 425640194 in words is "four hundred twenty-five million, six hundred forty thousand, one hundred ninety-four".