1551116611 has 4 divisors (see below), whose sum is σ = 1692127224. Its totient is φ = 1410106000.

The previous prime is 1551116599. The next prime is 1551116647. The reversal of 1551116611 is 1166111551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1551116611 - 2¹¹ = 1551114563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551116611.

It is not an unprimeable number, because it can be changed into a prime (1551116681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70505290 + ... + 70505311.

It is an arithmetic number, because the mean of its divisors is an integer number (423031806).

Almost surely, 2^1551116611 is an apocalyptic number.

1551116611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1551116611 is a deficient number, since it is larger than the sum of its proper divisors (141010613).

1551116611 is a wasteful number, since it uses less digits than its factorization.

1551116611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141010612.

The product of its digits is 900, while the sum is 28.

The square root of 1551116611 is about 39384.2177908867. The cubic root of 1551116611 is about 1157.5723633090.

The spelling of 1551116611 in words is "one billion, five hundred fifty-one million, one hundred sixteen thousand, six hundred eleven".