55616672869 has 2 divisors, whose sum is σ = 55616672870. Its totient is φ = 55616672868.

The previous prime is 55616672767. The next prime is 55616672927. The reversal of 55616672869 is 96827661655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45926633025 + 9690039844 = 214305^2 + 98438^2 .

It is a cyclic number.

It is not a de Polignac number, because 55616672869 - 2¹¹ = 55616670821 is a prime.

It is a super-2 number, since 2×55616672869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55616670869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27808336434 + 27808336435.

It is an arithmetic number, because the mean of its divisors is an integer number (27808336435).

Almost surely, 2^55616672869 is an apocalyptic number.

It is an amenable number.

55616672869 is a deficient number, since it is larger than the sum of its proper divisors (1).

55616672869 is an equidigital number, since it uses as much as digits as its factorization.

55616672869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32659200, while the sum is 61.

The spelling of 55616672869 in words is "fifty-five billion, six hundred sixteen million, six hundred seventy-two thousand, eight hundred sixty-nine".