990718954454 has 16 divisors (see below), whose sum is σ = 1564352682480. Its totient is φ = 469270046880.

The previous prime is 990718954447. The next prime is 990718954457. The reversal of 990718954454 is 454459817099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990718954457) 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, 542132 + ... + 1508424.

It is an arithmetic number, because the mean of its divisors is an integer number (97772042655).

Almost surely, 2^990718954454 is an apocalyptic number.

990718954454 is a deficient number, since it is larger than the sum of its proper divisors (573633728026).

990718954454 is a wasteful number, since it uses less digits than its factorization.

990718954454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993295.

The product of its (nonzero) digits is 65318400, while the sum is 65.

The spelling of 990718954454 in words is "nine hundred ninety billion, seven hundred eighteen million, nine hundred fifty-four thousand, four hundred fifty-four".