69216812149 has 2 divisors, whose sum is σ = 69216812150. Its totient is φ = 69216812148.

The previous prime is 69216812129. The next prime is 69216812173. The reversal of 69216812149 is 94121861296.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68640332049 + 576480100 = 261993^2 + 24010^2 .

It is a cyclic number.

It is not a de Polignac number, because 69216812149 - 2⁵ = 69216812117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69216812129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34608406074 + 34608406075.

It is an arithmetic number, because the mean of its divisors is an integer number (34608406075).

Almost surely, 2^69216812149 is an apocalyptic number.

It is an amenable number.

69216812149 is a deficient number, since it is larger than the sum of its proper divisors (1).

69216812149 is an equidigital number, since it uses as much as digits as its factorization.

69216812149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The spelling of 69216812149 in words is "sixty-nine billion, two hundred sixteen million, eight hundred twelve thousand, one hundred forty-nine".