150621320665 has 8 divisors (see below), whose sum is σ = 180749406600. Its totient is φ = 120494508672.

The previous prime is 150621320639. The next prime is 150621320687. The reversal of 150621320665 is 566023126051.

It can be written as a sum of positive squares in 4 ways, for example, as 3678665104 + 146942655561 = 60652^2 + 383331^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-150621320665 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35514 + ... + 550003.

It is an arithmetic number, because the mean of its divisors is an integer number (22593675825).

Almost surely, 2^150621320665 is an apocalyptic number.

It is an amenable number.

150621320665 is a deficient number, since it is larger than the sum of its proper divisors (30128085935).

150621320665 is an equidigital number, since it uses as much as digits as its factorization.

150621320665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636971.

The product of its (nonzero) digits is 64800, while the sum is 37.

It can be divided in two parts, 1506213 and 20665, that added together give a triangular number (1526878 = T₁₇₄₇).

The spelling of 150621320665 in words is "one hundred fifty billion, six hundred twenty-one million, three hundred twenty thousand, six hundred sixty-five".