1640163856154 has 8 divisors (see below), whose sum is σ = 2461411231488. Its totient is φ = 819693445660.

The previous prime is 1640163856151. The next prime is 1640163856157. The reversal of 1640163856154 is 4516583610461.

It is an interprime number because it is at equal distance from previous prime (1640163856151) and next prime (1640163856157).

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

It is not an unprimeable number, because it can be changed into a prime (1640163856151) 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, 194235932 + ... + 194244375.

It is an arithmetic number, because the mean of its divisors is an integer number (307676403936).

Almost surely, 2^{1640163856154} is an apocalyptic number.

1640163856154 is a deficient number, since it is larger than the sum of its proper divisors (821247375334).

1640163856154 is a wasteful number, since it uses less digits than its factorization.

1640163856154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388482420.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 1640163856154 in words is "one trillion, six hundred forty billion, one hundred sixty-three million, eight hundred fifty-six thousand, one hundred fifty-four".