9801651287040 has 88 divisors (see below), whose sum is σ = 31349969087520. Its totient is φ = 2613773672448.

The previous prime is 9801651286979. The next prime is 9801651287111. The reversal of 9801651287040 is 407821561089.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319048810 + ... + 319079529.

Almost surely, 2^{9801651287040} is an apocalyptic number.

It is an amenable number.

9801651287040 is an abundant number, since it is smaller than the sum of its proper divisors (21548317800480).

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

9801651287040 is a wasteful number, since it uses less digits than its factorization.

9801651287040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638128367 (or 638128349 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 9801651287040 in words is "nine trillion, eight hundred one billion, six hundred fifty-one million, two hundred eighty-seven thousand, forty".