990142977826 has 32 divisors (see below), whose sum is σ = 1575812931840. Its totient is φ = 464992217856.

The previous prime is 990142977793. The next prime is 990142977827. The reversal of 990142977826 is 628779241099.

990142977826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (990142977827) 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, 126467280 + ... + 126475108.

It is an arithmetic number, because the mean of its divisors is an integer number (49244154120).

Almost surely, 2^990142977826 is an apocalyptic number.

990142977826 is a deficient number, since it is larger than the sum of its proper divisors (585669954014).

990142977826 is a wasteful number, since it uses less digits than its factorization.

990142977826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15018.

The product of its (nonzero) digits is 27433728, while the sum is 64.

The spelling of 990142977826 in words is "nine hundred ninety billion, one hundred forty-two million, nine hundred seventy-seven thousand, eight hundred twenty-six".