1136620561 has 8 divisors (see below), whose sum is σ = 1203949440. Its totient is φ = 1069343808.

The previous prime is 1136620547. The next prime is 1136620579. The reversal of 1136620561 is 1650266311.

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-1136620561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1136620061) 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, 37500 + ... + 60658.

It is an arithmetic number, because the mean of its divisors is an integer number (150493680).

Almost surely, 2^1136620561 is an apocalyptic number.

It is an amenable number.

1136620561 is a deficient number, since it is larger than the sum of its proper divisors (67328879).

1136620561 is a wasteful number, since it uses less digits than its factorization.

1136620561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26063.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1136620561 is about 33713.8037159855. The cubic root of 1136620561 is about 1043.6106506162.

Adding to 1136620561 its reverse (1650266311), we get a palindrome (2786886872).

The spelling of 1136620561 in words is "one billion, one hundred thirty-six million, six hundred twenty thousand, five hundred sixty-one".