997425220554 has 72 divisors (see below), whose sum is σ = 2524708538820. Its totient is φ = 283755491712.

The previous prime is 997425220489. The next prime is 997425220577. The reversal of 997425220554 is 455022524799.

997425220554 is a `hidden beast` number, since 9 + 9 + 7 + 425 + 2 + 205 + 5 + 4 = 666.

997425220554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 913502027529 + 83923193025 = 955773^2 + 289695^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 997425220554.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2221249 + ... + 2632260.

Almost surely, 2^997425220554 is an apocalyptic number.

997425220554 is an abundant number, since it is smaller than the sum of its proper divisors (1527283318266).

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

997425220554 is a wasteful number, since it uses less digits than its factorization.

997425220554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853764 (or 4853754 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 997425220554 in words is "nine hundred ninety-seven billion, four hundred twenty-five million, two hundred twenty thousand, five hundred fifty-four".