1151201665 has 16 divisors (see below), whose sum is σ = 1465326720. Its totient is φ = 865232640.

The previous prime is 1151201663. The next prime is 1151201713. The reversal of 1151201665 is 5661021511.

It is a happy number.

It is not a de Polignac number, because 1151201665 - 2¹ = 1151201663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1151201663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36676 + ... + 60394.

It is an arithmetic number, because the mean of its divisors is an integer number (91582920).

Almost surely, 2^1151201665 is an apocalyptic number.

It is an amenable number.

1151201665 is a deficient number, since it is larger than the sum of its proper divisors (314125055).

1151201665 is a wasteful number, since it uses less digits than its factorization.

1151201665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24312.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1151201665 is about 33929.3628734758. The cubic root of 1151201665 is about 1048.0543455225.

The spelling of 1151201665 in words is "one billion, one hundred fifty-one million, two hundred one thousand, six hundred sixty-five".