1522437661 has 8 divisors (see below), whose sum is σ = 1558751040. Its totient is φ = 1486165632.

The previous prime is 1522437659. The next prime is 1522437673. The reversal of 1522437661 is 1667342251.

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 1522437661 - 2¹ = 1522437659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1522437661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1522437641) 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, 71856 + ... + 90598.

It is an arithmetic number, because the mean of its divisors is an integer number (194843880).

Almost surely, 2^1522437661 is an apocalyptic number.

It is an amenable number.

1522437661 is a deficient number, since it is larger than the sum of its proper divisors (36313379).

1522437661 is a wasteful number, since it uses less digits than its factorization.

1522437661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20675.

The product of its digits is 60480, while the sum is 37.

The square root of 1522437661 is about 39018.4271979279. The cubic root of 1522437661 is about 1150.3937305878.

The spelling of 1522437661 in words is "one billion, five hundred twenty-two million, four hundred thirty-seven thousand, six hundred sixty-one".