1501122661 has 8 divisors (see below), whose sum is σ = 1590563520. Its totient is φ = 1411808448.

The previous prime is 1501122659. The next prime is 1501122697. The reversal of 1501122661 is 1662211051.

It is a happy number.

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 1501122661 - 2¹ = 1501122659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1501122611) 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, 6681 + ... + 55198.

It is an arithmetic number, because the mean of its divisors is an integer number (198820440).

Almost surely, 2^1501122661 is an apocalyptic number.

It is an amenable number.

1501122661 is a deficient number, since it is larger than the sum of its proper divisors (89440859).

1501122661 is a wasteful number, since it uses less digits than its factorization.

1501122661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63323.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1501122661 is about 38744.3242423971. The cubic root of 1501122661 is about 1144.9997548991. Note that the first 3 decimals are identical.

The spelling of 1501122661 in words is "one billion, five hundred one million, one hundred twenty-two thousand, six hundred sixty-one".