31111952777677 has 2 divisors, whose sum is σ = 31111952777678. Its totient is φ = 31111952777676.

The previous prime is 31111952777671. The next prime is 31111952777683. The reversal of 31111952777677 is 77677725911113.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (31111952777671) and next prime (31111952777683).

It can be written as a sum of positive squares in only one way, i.e., 22543019706601 + 8568933071076 = 4747949^2 + 2927274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31111952777677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31111952777671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555976388838 + 15555976388839.

It is an arithmetic number, because the mean of its divisors is an integer number (15555976388839).

Almost surely, 2^{31111952777677} is an apocalyptic number.

It is an amenable number.

31111952777677 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111952777677 is an equidigital number, since it uses as much as digits as its factorization.

31111952777677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27227340, while the sum is 64.

The spelling of 31111952777677 in words is "thirty-one trillion, one hundred eleven billion, nine hundred fifty-two million, seven hundred seventy-seven thousand, six hundred seventy-seven".