2026166403561 has 32 divisors (see below), whose sum is σ = 2869106323968. Its totient is φ = 1267483883520.

The previous prime is 2026166403539. The next prime is 2026166403571. The reversal of 2026166403561 is 1653046616202.

It is not a de Polignac number, because 2026166403561 - 2⁶ = 2026166403497 is a prime.

It is a super-2 number, since 2×2026166403561² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2026166403571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72626731 + ... + 72654623.

It is an arithmetic number, because the mean of its divisors is an integer number (89659572624).

Almost surely, 2^{2026166403561} is an apocalyptic number.

It is an amenable number.

2026166403561 is a deficient number, since it is larger than the sum of its proper divisors (842939920407).

2026166403561 is a wasteful number, since it uses less digits than its factorization.

2026166403561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32161.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 2026166403561 in words is "two trillion, twenty-six billion, one hundred sixty-six million, four hundred three thousand, five hundred sixty-one".