9621085030991 has 16 divisors (see below), whose sum is σ = 11093046073344. Its totient is φ = 8173506897024.

The previous prime is 9621085030937. The next prime is 9621085030993. The reversal of 9621085030991 is 1990305801269.

It is a happy number.

It is not a de Polignac number, because 9621085030991 - 2⁴² = 5223038519887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9621085030993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60421706 + ... + 60580728.

It is an arithmetic number, because the mean of its divisors is an integer number (693315379584).

Almost surely, 2^{9621085030991} is an apocalyptic number.

9621085030991 is a deficient number, since it is larger than the sum of its proper divisors (1471961042353).

9621085030991 is a wasteful number, since it uses less digits than its factorization.

9621085030991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235630.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 9621085030991 in words is "nine trillion, six hundred twenty-one billion, eighty-five million, thirty thousand, nine hundred ninety-one".