151661369 has 8 divisors (see below), whose sum is σ = 162783720. Its totient is φ = 140783616.

The previous prime is 151661357. The next prime is 151661407. The reversal of 151661369 is 963166151.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9765625 + 141895744 = 3125^2 + 11912^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 151661369 - 2⁴ = 151661353 is a prime.

It is a super-2 number, since 2×151661369² = 46002341693908322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (151661309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59864 + ... + 62345.

It is an arithmetic number, because the mean of its divisors is an integer number (20347965).

Almost surely, 2^151661369 is an apocalyptic number.

It is an amenable number.

151661369 is a deficient number, since it is larger than the sum of its proper divisors (11122351).

151661369 is a wasteful number, since it uses less digits than its factorization.

151661369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122299.

The product of its digits is 29160, while the sum is 38.

The square root of 151661369 is about 12315.0870480074. The cubic root of 151661369 is about 533.2837177369.

The spelling of 151661369 in words is "one hundred fifty-one million, six hundred sixty-one thousand, three hundred sixty-nine".