2021557066562 has 8 divisors (see below), whose sum is σ = 3308002472592. Its totient is φ = 918889575700.

The previous prime is 2021557066561. The next prime is 2021557066567. The reversal of 2021557066562 is 2656607551202.

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 (2021557066561) 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, 45944478764 + ... + 45944478807.

It is an arithmetic number, because the mean of its divisors is an integer number (413500309074).

Almost surely, 2^{2021557066562} is an apocalyptic number.

2021557066562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2021557066562 is a deficient number, since it is larger than the sum of its proper divisors (1286445406030).

2021557066562 is a wasteful number, since it uses less digits than its factorization.

2021557066562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91888957584.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 2021557066562 in words is "two trillion, twenty-one billion, five hundred fifty-seven million, sixty-six thousand, five hundred sixty-two".