1640907974 has 8 divisors (see below), whose sum is σ = 2461551888. Its totient is φ = 820390680.

The previous prime is 1640907923. The next prime is 1640907997. The reversal of 1640907974 is 4797090461.

It is a happy number.

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

It is a congruent number.

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, 13799 + ... + 58925.

It is an arithmetic number, because the mean of its divisors is an integer number (307693986).

Almost surely, 2^1640907974 is an apocalyptic number.

1640907974 is a deficient number, since it is larger than the sum of its proper divisors (820643914).

1640907974 is a wasteful number, since it uses less digits than its factorization.

1640907974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63310.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 1640907974 is about 40508.1223213321. The cubic root of 1640907974 is about 1179.4912999295.

The spelling of 1640907974 in words is "one billion, six hundred forty million, nine hundred seven thousand, nine hundred seventy-four".