87428168769 has 16 divisors (see below), whose sum is σ = 124214179968. Its totient is φ = 54507478272.

The previous prime is 87428168693. The next prime is 87428168777. The reversal of 87428168769 is 96786182478.

It is a happy number.

It is not a de Polignac number, because 87428168769 - 2¹³ = 87428160577 is a prime.

It is a super-2 number, since 2×87428168769² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87428168369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5451477 + ... + 5467490.

It is an arithmetic number, because the mean of its divisors is an integer number (7763386248).

Almost surely, 2^87428168769 is an apocalyptic number.

It is an amenable number.

87428168769 is a deficient number, since it is larger than the sum of its proper divisors (36786011199).

87428168769 is a wasteful number, since it uses less digits than its factorization.

87428168769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10919144.

The product of its digits is 65028096, while the sum is 66.

The spelling of 87428168769 in words is "eighty-seven billion, four hundred twenty-eight million, one hundred sixty-eight thousand, seven hundred sixty-nine".