1155957639 has 8 divisors (see below), whose sum is σ = 1552527600. Its totient is φ = 765013056.

The previous prime is 1155957631. The next prime is 1155957643. The reversal of 1155957639 is 9367595511.

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

It is not a de Polignac number, because 1155957639 - 2³ = 1155957631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1155957591 and 1155957600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155957631) 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, 1405864 + ... + 1406685.

It is an arithmetic number, because the mean of its divisors is an integer number (194065950).

Almost surely, 2^1155957639 is an apocalyptic number.

1155957639 is a deficient number, since it is larger than the sum of its proper divisors (396569961).

1155957639 is a wasteful number, since it uses less digits than its factorization.

1155957639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812689.

The product of its digits is 1275750, while the sum is 51.

The square root of 1155957639 is about 33999.3770384106. The cubic root of 1155957639 is about 1049.4956425828.

The spelling of 1155957639 in words is "one billion, one hundred fifty-five million, nine hundred fifty-seven thousand, six hundred thirty-nine".