990052249478 has 32 divisors (see below), whose sum is σ = 1540248084480. Its totient is φ = 476788654080.

The previous prime is 990052249463. The next prime is 990052249499. The reversal of 990052249478 is 874942250099.

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, 80557958 + ... + 80570246.

It is an arithmetic number, because the mean of its divisors is an integer number (48132752640).

Almost surely, 2^990052249478 is an apocalyptic number.

990052249478 is a deficient number, since it is larger than the sum of its proper divisors (550195835002).

990052249478 is a wasteful number, since it uses less digits than its factorization.

990052249478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18372.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 990052249478 in words is "nine hundred ninety billion, fifty-two million, two hundred forty-nine thousand, four hundred seventy-eight".