9910920435551 has 4 divisors (see below), whose sum is σ = 10141406957352. Its totient is φ = 9680433913752.

The previous prime is 9910920435539. The next prime is 9910920435571. The reversal of 9910920435551 is 1555340290199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9910920435551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9910920435493 and 9910920435502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9910920435571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115243260836 + ... + 115243260921.

It is an arithmetic number, because the mean of its divisors is an integer number (2535351739338).

Almost surely, 2^{9910920435551} is an apocalyptic number.

9910920435551 is a deficient number, since it is larger than the sum of its proper divisors (230486521801).

9910920435551 is a wasteful number, since it uses less digits than its factorization.

9910920435551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230486521800.

The product of its (nonzero) digits is 2187000, while the sum is 53.

The spelling of 9910920435551 in words is "nine trillion, nine hundred ten billion, nine hundred twenty million, four hundred thirty-five thousand, five hundred fifty-one".