71890211501 has 2 divisors, whose sum is σ = 71890211502. Its totient is φ = 71890211500.

The previous prime is 71890211467. The next prime is 71890211527. The reversal of 71890211501 is 10511209817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71286330025 + 603881476 = 266995^2 + 24574^2 .

It is a cyclic number.

It is not a de Polignac number, because 71890211501 - 2¹⁸ = 71889949357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71890217501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35945105750 + 35945105751.

It is an arithmetic number, because the mean of its divisors is an integer number (35945105751).

Almost surely, 2^71890211501 is an apocalyptic number.

It is an amenable number.

71890211501 is a deficient number, since it is larger than the sum of its proper divisors (1).

71890211501 is an equidigital number, since it uses as much as digits as its factorization.

71890211501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 35.

The spelling of 71890211501 in words is "seventy-one billion, eight hundred ninety million, two hundred eleven thousand, five hundred one".