2111654612553 has 48 divisors (see below), whose sum is σ = 3117119785920. Its totient is φ = 1267064415232.

The previous prime is 2111654612549. The next prime is 2111654612567. The reversal of 2111654612553 is 3552164561112.

It is not a de Polignac number, because 2111654612553 - 2² = 2111654612549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111654612513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 212670493 + ... + 212680421.

It is an arithmetic number, because the mean of its divisors is an integer number (64939995540).

Almost surely, 2^{2111654612553} is an apocalyptic number.

2111654612553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2111654612553 is a deficient number, since it is larger than the sum of its proper divisors (1005465173367).

2111654612553 is a wasteful number, since it uses less digits than its factorization.

2111654612553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17878 (or 17855 counting only the distinct ones).

The product of its digits is 216000, while the sum is 42.

The spelling of 2111654612553 in words is "two trillion, one hundred eleven billion, six hundred fifty-four million, six hundred twelve thousand, five hundred fifty-three".