89778985657 has 8 divisors (see below), whose sum is σ = 95270258880. Its totient is φ = 84420032400.

The previous prime is 89778985643. The next prime is 89778985663. The reversal of 89778985657 is 75658987798.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89778985657 - 2³¹ = 87631502009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89778985057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33078594 + ... + 33081307.

It is an arithmetic number, because the mean of its divisors is an integer number (11908782360).

Almost surely, 2^89778985657 is an apocalyptic number.

It is an amenable number.

89778985657 is a deficient number, since it is larger than the sum of its proper divisors (5491273223).

89778985657 is a wasteful number, since it uses less digits than its factorization.

89778985657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66159983.

The product of its digits is 2133734400, while the sum is 79.

The spelling of 89778985657 in words is "eighty-nine billion, seven hundred seventy-eight million, nine hundred eighty-five thousand, six hundred fifty-seven".