21962761148551 has 2 divisors, whose sum is σ = 21962761148552. Its totient is φ = 21962761148550.

The previous prime is 21962761148519. The next prime is 21962761148621. The reversal of 21962761148551 is 15584116726912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21962761148551 - 2⁵ = 21962761148519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21962761188551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10981380574275 + 10981380574276.

It is an arithmetic number, because the mean of its divisors is an integer number (10981380574276).

Almost surely, 2^{21962761148551} is an apocalyptic number.

21962761148551 is a deficient number, since it is larger than the sum of its proper divisors (1).

21962761148551 is an equidigital number, since it uses as much as digits as its factorization.

21962761148551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 58.

The spelling of 21962761148551 in words is "twenty-one trillion, nine hundred sixty-two billion, seven hundred sixty-one million, one hundred forty-eight thousand, five hundred fifty-one".