997309032040 has 24 divisors (see below), whose sum is σ = 2243959533270. Its totient is φ = 398921086400.

The previous prime is 997309032019. The next prime is 997309032059. The reversal of 997309032040 is 40230903799.

It can be written as a sum of positive squares in 3 ways, for example, as 607536066916 + 389772965124 = 779446^2 + 624318^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6237090 + ... + 6394990.

Almost surely, 2^997309032040 is an apocalyptic number.

It is an amenable number.

997309032040 is an abundant number, since it is smaller than the sum of its proper divisors (1246650501230).

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

997309032040 is an frugal number, since it uses more digits than its factorization.

997309032040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315813 (or 157908 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 46.

The spelling of 997309032040 in words is "nine hundred ninety-seven billion, three hundred nine million, thirty-two thousand, forty".