11557623977 has 2 divisors, whose sum is σ = 11557623978. Its totient is φ = 11557623976.

The previous prime is 11557623967. The next prime is 11557624009. The reversal of 11557623977 is 77932675511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10133240896 + 1424383081 = 100664^2 + 37741^2 .

It is a cyclic number.

It is not a de Polignac number, because 11557623977 - 2²⁴ = 11540846761 is a prime.

It is not a weakly prime, because it can be changed into another prime (11557623967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778811988 + 5778811989.

It is an arithmetic number, because the mean of its divisors is an integer number (5778811989).

Almost surely, 2^11557623977 is an apocalyptic number.

It is an amenable number.

11557623977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11557623977 is an equidigital number, since it uses as much as digits as its factorization.

11557623977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2778300, while the sum is 53.

The spelling of 11557623977 in words is "eleven billion, five hundred fifty-seven million, six hundred twenty-three thousand, nine hundred seventy-seven".