977385155891 has 2 divisors, whose sum is σ = 977385155892. Its totient is φ = 977385155890.

The previous prime is 977385155869. The next prime is 977385155987. The reversal of 977385155891 is 198551583779.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 977385155891 - 2¹⁸ = 977384893747 is a prime.

It is not a weakly prime, because it can be changed into another prime (977385155801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488692577945 + 488692577946.

It is an arithmetic number, because the mean of its divisors is an integer number (488692577946).

Almost surely, 2^977385155891 is an apocalyptic number.

977385155891 is a deficient number, since it is larger than the sum of its proper divisors (1).

977385155891 is an equidigital number, since it uses as much as digits as its factorization.

977385155891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256000, while the sum is 68.

The spelling of 977385155891 in words is "nine hundred seventy-seven billion, three hundred eighty-five million, one hundred fifty-five thousand, eight hundred ninety-one".