511011055551 has 8 divisors (see below), whose sum is σ = 681846505344. Its totient is φ = 340424821400.

The previous prime is 511011055523. The next prime is 511011055567. The reversal of 511011055551 is 155550110115.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 511011055551 - 2⁵ = 511011055519 is a prime.

It is a super-2 number, since 2×511011055551² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511011055571) 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, 62299125 + ... + 62307326.

It is an arithmetic number, because the mean of its divisors is an integer number (85230813168).

Almost surely, 2^511011055551 is an apocalyptic number.

511011055551 is a deficient number, since it is larger than the sum of its proper divisors (170835449793).

511011055551 is a wasteful number, since it uses less digits than its factorization.

511011055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124607821.

The product of its (nonzero) digits is 3125, while the sum is 30.

Adding to 511011055551 its reverse (155550110115), we get a palindrome (666561165666).

The spelling of 511011055551 in words is "five hundred eleven billion, eleven million, fifty-five thousand, five hundred fifty-one".