2156262026540 has 48 divisors (see below), whose sum is σ = 4676787043488. Its totient is φ = 834638897664.

The previous prime is 2156262026521. The next prime is 2156262026549. The reversal of 2156262026540 is 456202626512.

It is a super-3 number, since 3×2156262026540³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2156262026549) 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 15 ways as a sum of consecutive naturals, for example, 13855562 + ... + 14010321.

It is an arithmetic number, because the mean of its divisors is an integer number (97433063406).

Almost surely, 2^{2156262026540} is an apocalyptic number.

2156262026540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156262026540 is an abundant number, since it is smaller than the sum of its proper divisors (2520525016948).

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

2156262026540 is a wasteful number, since it uses less digits than its factorization.

2156262026540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27866018 (or 27866016 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 2156262026540 in words is "two trillion, one hundred fifty-six billion, two hundred sixty-two million, twenty-six thousand, five hundred forty".