2021164640154 has 48 divisors (see below), whose sum is σ = 4878942906240. Its totient is φ = 599442766080.

The previous prime is 2021164640153. The next prime is 2021164640167. The reversal of 2021164640154 is 4510464611202.

2021164640154 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 1 + 6 + 4 + 640 + 1 + 5 + 4 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2021164640153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108585399 + ... + 108604010.

It is an arithmetic number, because the mean of its divisors is an integer number (101644643880).

Almost surely, 2^{2021164640154} is an apocalyptic number.

2021164640154 is an abundant number, since it is smaller than the sum of its proper divisors (2857778266086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021164640154 is a wasteful number, since it uses less digits than its factorization.

2021164640154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217189475 (or 217189472 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 2021164640154 in words is "two trillion, twenty-one billion, one hundred sixty-four million, six hundred forty thousand, one hundred fifty-four".