90202988478678 has 32 divisors (see below), whose sum is σ = 180532404758016. Its totient is φ = 30046592675808.

The previous prime is 90202988478649. The next prime is 90202988478709. The reversal of 90202988478678 is 87687488920209.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368650725 + ... + 368895327.

It is an arithmetic number, because the mean of its divisors is an integer number (5641637648688).

Almost surely, 2^{90202988478678} is an apocalyptic number.

90202988478678 is an abundant number, since it is smaller than the sum of its proper divisors (90329416279338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90202988478678 is a wasteful number, since it uses less digits than its factorization.

90202988478678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287428.

The product of its (nonzero) digits is 1560674304, while the sum is 78.

The spelling of 90202988478678 in words is "ninety trillion, two hundred two billion, nine hundred eighty-eight million, four hundred seventy-eight thousand, six hundred seventy-eight".