2154661202553 has 24 divisors (see below), whose sum is σ = 3131960613600. Its totient is φ = 1313913154176.

The previous prime is 2154661202549. The next prime is 2154661202587. The reversal of 2154661202553 is 3552021664512.

It is not a de Polignac number, because 2154661202553 - 2² = 2154661202549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154661200553) 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, 22425948 + ... + 22521821.

It is an arithmetic number, because the mean of its divisors is an integer number (130498358900).

Almost surely, 2^{2154661202553} is an apocalyptic number.

It is an amenable number.

2154661202553 is a deficient number, since it is larger than the sum of its proper divisors (977299411047).

2154661202553 is a wasteful number, since it uses less digits than its factorization.

2154661202553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44947849 (or 44947820 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 2154661202553 in words is "two trillion, one hundred fifty-four billion, six hundred sixty-one million, two hundred two thousand, five hundred fifty-three".