3640144642 has 8 divisors (see below), whose sum is σ = 5576391936. Its totient is φ = 1781347332.

The previous prime is 3640144577. The next prime is 3640144681. The reversal of 3640144642 is 2464410463.

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 = 3640144598 and 3640144607.

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, 19362378 + ... + 19362565.

It is an arithmetic number, because the mean of its divisors is an integer number (697048992).

Almost surely, 2^3640144642 is an apocalyptic number.

3640144642 is a deficient number, since it is larger than the sum of its proper divisors (1936247294).

3640144642 is a wasteful number, since it uses less digits than its factorization.

3640144642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38724992.

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 3640144642 is about 60333.6112129881. The cubic root of 3640144642 is about 1538.2947112997.

The spelling of 3640144642 in words is "three billion, six hundred forty million, one hundred forty-four thousand, six hundred forty-two".