21611771154753 has 16 divisors (see below), whose sum is σ = 31039438973760. Its totient is φ = 13296486256704.

The previous prime is 21611771154689. The next prime is 21611771154769. The reversal of 21611771154753 is 35745117711612.

It is not a de Polignac number, because 21611771154753 - 2⁶ = 21611771154689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21611771154696 and 21611771154705.

It is not an unprimeable number, because it can be changed into a prime (21611771154773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63687426 + ... + 64025867.

It is an arithmetic number, because the mean of its divisors is an integer number (1939964935860).

Almost surely, 2^{21611771154753} is an apocalyptic number.

It is an amenable number.

21611771154753 is a deficient number, since it is larger than the sum of its proper divisors (9427667819007).

21611771154753 is a wasteful number, since it uses less digits than its factorization.

21611771154753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127717648.

The product of its digits is 1234800, while the sum is 51.

The spelling of 21611771154753 in words is "twenty-one trillion, six hundred eleven billion, seven hundred seventy-one million, one hundred fifty-four thousand, seven hundred fifty-three".