9942685621 has 32 divisors (see below), whose sum is σ = 11436480000. Its totient is φ = 8561609280.

The previous prime is 9942685609. The next prime is 9942685639. The reversal of 9942685621 is 1265862499.

It is a cyclic number.

It is not a de Polignac number, because 9942685621 - 2¹⁷ = 9942554549 is a prime.

It is a pancake number, because a pancake can be divided into 9942685621 parts by 141015 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9942685651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6632130 + ... + 6633628.

It is an arithmetic number, because the mean of its divisors is an integer number (357390000).

Almost surely, 2^9942685621 is an apocalyptic number.

It is an amenable number.

9942685621 is a deficient number, since it is larger than the sum of its proper divisors (1493794379).

9942685621 is a wasteful number, since it uses less digits than its factorization.

9942685621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969.

The product of its digits is 1866240, while the sum is 52.

The square root of 9942685621 is about 99713.0163067992. The cubic root of 9942685621 is about 2150.3107984805.

The spelling of 9942685621 in words is "nine billion, nine hundred forty-two million, six hundred eighty-five thousand, six hundred twenty-one".