1516150661 has 8 divisors (see below), whose sum is σ = 1605792600. Its totient is φ = 1426559488.

The previous prime is 1516150633. The next prime is 1516150667. The reversal of 1516150661 is 1660516151.

It can be written as a sum of positive squares in 4 ways, for example, as 389272900 + 1126877761 = 19730^2 + 33569^2 .

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

It is not a de Polignac number, because 1516150661 - 2¹⁰ = 1516149637 is a prime.

It is a super-3 number, since 3×1516150661³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516150667) 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, 61115 + ... + 82263.

It is an arithmetic number, because the mean of its divisors is an integer number (200724075).

Almost surely, 2^1516150661 is an apocalyptic number.

It is an amenable number.

1516150661 is a deficient number, since it is larger than the sum of its proper divisors (89641939).

1516150661 is a wasteful number, since it uses less digits than its factorization.

1516150661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25383.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1516150661 is about 38937.7793537331. The cubic root of 1516150661 is about 1148.8080052315.

The spelling of 1516150661 in words is "one billion, five hundred sixteen million, one hundred fifty thousand, six hundred sixty-one".