11537778552 has 64 divisors (see below), whose sum is σ = 30553355520. Its totient is φ = 3618252288.

The previous prime is 11537778541. The next prime is 11537778559. The reversal of 11537778552 is 25587773511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 11537778495 and 11537778504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11537778559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1533183 + ... + 1540689.

It is an arithmetic number, because the mean of its divisors is an integer number (477396180).

Almost surely, 2^11537778552 is an apocalyptic number.

11537778552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11537778552 is an abundant number, since it is smaller than the sum of its proper divisors (19015576968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11537778552 is a wasteful number, since it uses less digits than its factorization.

11537778552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11300 (or 11296 counting only the distinct ones).

The product of its digits is 2058000, while the sum is 51.

The spelling of 11537778552 in words is "eleven billion, five hundred thirty-seven million, seven hundred seventy-eight thousand, five hundred fifty-two".