641949146 has 8 divisors (see below), whose sum is σ = 979244640. Its totient is φ = 315534268.

The previous prime is 641949137. The next prime is 641949151.

641949146 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 641949097 and 641949106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2720006 + ... + 2720241.

It is an arithmetic number, because the mean of its divisors is an integer number (122405580).

Almost surely, 2^641949146 is an apocalyptic number.

641949146 is a deficient number, since it is larger than the sum of its proper divisors (337295494).

641949146 is a wasteful number, since it uses less digits than its factorization.

641949146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440308.

The product of its digits is 186624, while the sum is 44.

The square root of 641949146 is about 25336.7153751231. The cubic root of 641949146 is about 862.6478451591.

The spelling of 641949146 in words is "six hundred forty-one million, nine hundred forty-nine thousand, one hundred forty-six".