55131777707 has 12 divisors (see below), whose sum is σ = 57161360880. Its totient is φ = 53172014112.

The previous prime is 55131777689. The next prime is 55131777721. The reversal of 55131777707 is 70777713155.

55131777707 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 55131777707 - 2⁸ = 55131777451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55131777737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 737213 + ... + 808545.

It is an arithmetic number, because the mean of its divisors is an integer number (4763446740).

Almost surely, 2^55131777707 is an apocalyptic number.

55131777707 is a deficient number, since it is larger than the sum of its proper divisors (2029583173).

55131777707 is an equidigital number, since it uses as much as digits as its factorization.

55131777707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72310 (or 72281 counting only the distinct ones).

The product of its (nonzero) digits is 1260525, while the sum is 50.

The spelling of 55131777707 in words is "fifty-five billion, one hundred thirty-one million, seven hundred seventy-seven thousand, seven hundred seven".