55711691 has 8 divisors (see below), whose sum is σ = 63721440. Its totient is φ = 47714688.

The previous prime is 55711687. The next prime is 55711739. The reversal of 55711691 is 19611755.

It is a happy number.

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

It is not a de Polignac number, because 55711691 - 2² = 55711687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55711631) 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, 9635 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (7965180).

Almost surely, 2^55711691 is an apocalyptic number.

55711691 is a deficient number, since it is larger than the sum of its proper divisors (8009749).

55711691 is a wasteful number, since it uses less digits than its factorization.

55711691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373.

The product of its digits is 9450, while the sum is 35.

The square root of 55711691 is about 7464.0264602961. The cubic root of 55711691 is about 381.9285407664.

The spelling of 55711691 in words is "fifty-five million, seven hundred eleven thousand, six hundred ninety-one".