150640561 has 2 divisors, whose sum is σ = 150640562. Its totient is φ = 150640560.

The previous prime is 150640543. The next prime is 150640573. The reversal of 150640561 is 165046051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116640000 + 34000561 = 10800^2 + 5831^2 .

It is an emirp because it is prime and its reverse (165046051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 150640561 - 2⁷ = 150640433 is a prime.

It is not a weakly prime, because it can be changed into another prime (150640261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75320280 + 75320281.

It is an arithmetic number, because the mean of its divisors is an integer number (75320281).

Almost surely, 2^150640561 is an apocalyptic number.

150640561 is the 6561-st centered heptagonal number.

It is an amenable number.

150640561 is a deficient number, since it is larger than the sum of its proper divisors (1).

150640561 is an equidigital number, since it uses as much as digits as its factorization.

150640561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 150640561 is about 12273.5716480575. The cubic root of 150640561 is about 532.0845412314.

The spelling of 150640561 in words is "one hundred fifty million, six hundred forty thousand, five hundred sixty-one".