99777374057 has 2 divisors, whose sum is σ = 99777374058. Its totient is φ = 99777374056.

The previous prime is 99777374033. The next prime is 99777374087. The reversal of 99777374057 is 75047377799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97483826176 + 2293547881 = 312224^2 + 47891^2 .

It is a cyclic number.

It is not a de Polignac number, because 99777374057 - 2¹² = 99777369961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99777373984 and 99777374002.

It is not a weakly prime, because it can be changed into another prime (99777374087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49888687028 + 49888687029.

It is an arithmetic number, because the mean of its divisors is an integer number (49888687029).

Almost surely, 2^99777374057 is an apocalyptic number.

It is an amenable number.

99777374057 is a deficient number, since it is larger than the sum of its proper divisors (1).

99777374057 is an equidigital number, since it uses as much as digits as its factorization.

99777374057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81682020, while the sum is 65.

The spelling of 99777374057 in words is "ninety-nine billion, seven hundred seventy-seven million, three hundred seventy-four thousand, fifty-seven".