997601630142 has 64 divisors (see below), whose sum is σ = 2166111166464. Its totient is φ = 304465392000.

The previous prime is 997601630101. The next prime is 997601630231. The reversal of 997601630142 is 241036106799.

It is a junction number, because it is equal to n+sod(n) for n = 997601630091 and 997601630100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54483753 + ... + 54502059.

It is an arithmetic number, because the mean of its divisors is an integer number (33845486976).

Almost surely, 2^997601630142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997601630142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083055583232).

997601630142 is an abundant number, since it is smaller than the sum of its proper divisors (1168509536322).

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

997601630142 is a wasteful number, since it uses less digits than its factorization.

997601630142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23953.

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 997601630142 in words is "nine hundred ninety-seven billion, six hundred one million, six hundred thirty thousand, one hundred forty-two".