89928778451 has 2 divisors, whose sum is σ = 89928778452. Its totient is φ = 89928778450.

The previous prime is 89928778441. The next prime is 89928778543. The reversal of 89928778451 is 15487782998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89928778451 - 2¹⁴ = 89928762067 is a prime.

It is not a weakly prime, because it can be changed into another prime (89928778421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44964389225 + 44964389226.

It is an arithmetic number, because the mean of its divisors is an integer number (44964389226).

Almost surely, 2^89928778451 is an apocalyptic number.

89928778451 is a deficient number, since it is larger than the sum of its proper divisors (1).

89928778451 is an equidigital number, since it uses as much as digits as its factorization.

89928778451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 68.

The spelling of 89928778451 in words is "eighty-nine billion, nine hundred twenty-eight million, seven hundred seventy-eight thousand, four hundred fifty-one".