55011001155 has 64 divisors (see below), whose sum is σ = 98681960448. Its totient is φ = 25933340160.

The previous prime is 55011001141. The next prime is 55011001159. The reversal of 55011001155 is 55110011055.

55011001155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55011001155 - 2⁴ = 55011001139 is a prime.

It is a super-2 number, since 2×55011001155² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55011001159) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14387574 + ... + 14391396.

It is an arithmetic number, because the mean of its divisors is an integer number (1541905632).

Almost surely, 2^55011001155 is an apocalyptic number.

55011001155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55011001155 is a deficient number, since it is larger than the sum of its proper divisors (43670959293).

55011001155 is a wasteful number, since it uses less digits than its factorization.

55011001155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6236.

The product of its (nonzero) digits is 625, while the sum is 24.

The spelling of 55011001155 in words is "fifty-five billion, eleven million, one thousand, one hundred fifty-five".