1155650001 has 32 divisors (see below), whose sum is σ = 1720922112. Its totient is φ = 683866560.

The previous prime is 1155649993. The next prime is 1155650003. The reversal of 1155650001 is 1000565511.

It is not a de Polignac number, because 1155650001 - 2³ = 1155649993 is a prime.

It is a super-2 number, since 2×1155650001² = 2671053849622600002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155650003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 388546 + ... + 391508.

It is an arithmetic number, because the mean of its divisors is an integer number (53778816).

Almost surely, 2^1155650001 is an apocalyptic number.

1155650001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155650001 is a deficient number, since it is larger than the sum of its proper divisors (565272111).

1155650001 is a wasteful number, since it uses less digits than its factorization.

1155650001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1155650001 is about 33994.8525662342. The cubic root of 1155650001 is about 1049.4025326581.

It can be divided in two parts, 1155 and 650001, that added together give a palindrome (651156).

The spelling of 1155650001 in words is "one billion, one hundred fifty-five million, six hundred fifty thousand, one".