1640712055 has 8 divisors (see below), whose sum is σ = 1969074000. Its totient is φ = 1312423296.

The previous prime is 1640712023. The next prime is 1640712067. The reversal of 1640712055 is 5502170461.

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

It is a cyclic number.

It is not a de Polignac number, because 1640712055 - 2⁵ = 1640712023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68271 + ... + 89119.

It is an arithmetic number, because the mean of its divisors is an integer number (246134250).

Almost surely, 2^1640712055 is an apocalyptic number.

1640712055 is a deficient number, since it is larger than the sum of its proper divisors (328361945).

1640712055 is a wasteful number, since it uses less digits than its factorization.

1640712055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36593.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1640712055 is about 40505.7039810444. The cubic root of 1640712055 is about 1179.4443556041. Note that the first 3 decimals are identical.

The spelling of 1640712055 in words is "one billion, six hundred forty million, seven hundred twelve thousand, fifty-five".