49665687923 has 2 divisors, whose sum is σ = 49665687924. Its totient is φ = 49665687922.

The previous prime is 49665687913. The next prime is 49665687937. The reversal of 49665687923 is 32978656694.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49665687923 - 2¹² = 49665683827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49665687923.

It is not a weakly prime, because it can be changed into another prime (49665687913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24832843961 + 24832843962.

It is an arithmetic number, because the mean of its divisors is an integer number (24832843962).

Almost surely, 2^49665687923 is an apocalyptic number.

49665687923 is a deficient number, since it is larger than the sum of its proper divisors (1).

49665687923 is an equidigital number, since it uses as much as digits as its factorization.

49665687923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 65.

The spelling of 49665687923 in words is "forty-nine billion, six hundred sixty-five million, six hundred eighty-seven thousand, nine hundred twenty-three".