1155977955 has 72 divisors (see below), whose sum is σ = 2307305520. Its totient is φ = 530893440.

The previous prime is 1155977899. The next prime is 1155977957. The reversal of 1155977955 is 5597795511.

It is a happy number.

1155977955 is a `hidden beast` number, since 11 + 559 + 7 + 79 + 5 + 5 = 666.

1155977955 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1155977955 - 2¹¹ = 1155975907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155977957) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 175461 + ... + 181929.

It is an arithmetic number, because the mean of its divisors is an integer number (32045910).

Almost surely, 2^1155977955 is an apocalyptic number.

1155977955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155977955 is a deficient number, since it is larger than the sum of its proper divisors (1151327565).

1155977955 is a wasteful number, since it uses less digits than its factorization.

1155977955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6529 (or 6507 counting only the distinct ones).

The product of its digits is 2480625, while the sum is 54.

The square root of 1155977955 is about 33999.6758072779. The cubic root of 1155977955 is about 1049.5017908556.

The spelling of 1155977955 in words is "one billion, one hundred fifty-five million, nine hundred seventy-seven thousand, nine hundred fifty-five".