1640145046 has 8 divisors (see below), whose sum is σ = 2460675744. Its totient is φ = 819919800.

The previous prime is 1640145007. The next prime is 1640145047. The reversal of 1640145046 is 6405410461.

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 = 1640144999 and 1640145017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640145047) 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, 62430 + ... + 84721.

It is an arithmetic number, because the mean of its divisors is an integer number (307584468).

Almost surely, 2^1640145046 is an apocalyptic number.

1640145046 is a deficient number, since it is larger than the sum of its proper divisors (820530698).

1640145046 is a wasteful number, since it uses less digits than its factorization.

1640145046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152726.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1640145046 is about 40498.7042508770. The cubic root of 1640145046 is about 1179.3084730127.

The spelling of 1640145046 in words is "one billion, six hundred forty million, one hundred forty-five thousand, forty-six".