151666501409 has 2 divisors, whose sum is σ = 151666501410. Its totient is φ = 151666501408.

The previous prime is 151666501403. The next prime is 151666501447. The reversal of 151666501409 is 904105666151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95827393600 + 55839107809 = 309560^2 + 236303^2 .

It is a cyclic number.

It is not a de Polignac number, because 151666501409 - 2⁸ = 151666501153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151666501409.

It is not a weakly prime, because it can be changed into another prime (151666501403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75833250704 + 75833250705.

It is an arithmetic number, because the mean of its divisors is an integer number (75833250705).

Almost surely, 2^151666501409 is an apocalyptic number.

It is an amenable number.

151666501409 is a deficient number, since it is larger than the sum of its proper divisors (1).

151666501409 is an equidigital number, since it uses as much as digits as its factorization.

151666501409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 151666501409 in words is "one hundred fifty-one billion, six hundred sixty-six million, five hundred one thousand, four hundred nine".