990056321457 has 8 divisors (see below), whose sum is σ = 1508657251776. Its totient is φ = 565746469392.

The previous prime is 990056321453. The next prime is 990056321467. The reversal of 990056321457 is 754123650099.

990056321457 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 990056321457 - 2² = 990056321453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990056321453) 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, 23572769538 + ... + 23572769579.

It is an arithmetic number, because the mean of its divisors is an integer number (188582156472).

Almost surely, 2^990056321457 is an apocalyptic number.

It is an amenable number.

990056321457 is a deficient number, since it is larger than the sum of its proper divisors (518600930319).

990056321457 is a wasteful number, since it uses less digits than its factorization.

990056321457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47145539127.

The product of its (nonzero) digits is 2041200, while the sum is 51.

The spelling of 990056321457 in words is "nine hundred ninety billion, fifty-six million, three hundred twenty-one thousand, four hundred fifty-seven".