2129653693501 has 2 divisors, whose sum is σ = 2129653693502. Its totient is φ = 2129653693500.

The previous prime is 2129653693439. The next prime is 2129653693513. The reversal of 2129653693501 is 1053963569212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2053701089476 + 75952604025 = 1433074^2 + 275595^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129653693501 - 2²⁷ = 2129519475773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129653693201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064826846750 + 1064826846751.

It is an arithmetic number, because the mean of its divisors is an integer number (1064826846751).

Almost surely, 2^{2129653693501} is an apocalyptic number.

It is an amenable number.

2129653693501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129653693501 is an equidigital number, since it uses as much as digits as its factorization.

2129653693501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2624400, while the sum is 52.

The spelling of 2129653693501 in words is "two trillion, one hundred twenty-nine billion, six hundred fifty-three million, six hundred ninety-three thousand, five hundred one".