89434651978 has 16 divisors (see below), whose sum is σ = 153372384000. Its totient is φ = 38315177136.

The previous prime is 89434651931. The next prime is 89434651979. The reversal of 89434651978 is 87915643498.

It is not an unprimeable number, because it can be changed into a prime (89434651979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1123426 + ... + 1200397.

It is an arithmetic number, because the mean of its divisors is an integer number (9585774000).

Almost surely, 2^89434651978 is an apocalyptic number.

89434651978 is a deficient number, since it is larger than the sum of its proper divisors (63937732022).

89434651978 is a wasteful number, since it uses less digits than its factorization.

89434651978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326581.

The product of its digits is 52254720, while the sum is 64.

The spelling of 89434651978 in words is "eighty-nine billion, four hundred thirty-four million, six hundred fifty-one thousand, nine hundred seventy-eight".