151786561 has 2 divisors, whose sum is σ = 151786562. Its totient is φ = 151786560.

The previous prime is 151786549. The next prime is 151786589. The reversal of 151786561 is 165687151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124746561 + 27040000 = 11169^2 + 5200^2 .

It is a cyclic number.

It is not a de Polignac number, because 151786561 - 2⁵ = 151786529 is a prime.

It is not a weakly prime, because it can be changed into another prime (151781561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75893280 + 75893281.

It is an arithmetic number, because the mean of its divisors is an integer number (75893281).

Almost surely, 2^151786561 is an apocalyptic number.

It is an amenable number.

151786561 is a deficient number, since it is larger than the sum of its proper divisors (1).

151786561 is an equidigital number, since it uses as much as digits as its factorization.

151786561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 151786561 is about 12320.1688705959. The cubic root of 151786561 is about 533.4304140551.

The spelling of 151786561 in words is "one hundred fifty-one million, seven hundred eighty-six thousand, five hundred sixty-one".