9925655551 has 12 divisors (see below), whose sum is σ = 11555119800. Its totient is φ = 8501110800.

The previous prime is 9925655503. The next prime is 9925655587. The reversal of 9925655551 is 1555565299.

It is not a de Polignac number, because 9925655551 - 2¹⁵ = 9925622783 is a prime.

It is a super-2 number, since 2×9925655551² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9925655591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14101 + ... + 141598.

It is an arithmetic number, because the mean of its divisors is an integer number (962926650).

Almost surely, 2^9925655551 is an apocalyptic number.

9925655551 is a deficient number, since it is larger than the sum of its proper divisors (1629464249).

9925655551 is a wasteful number, since it uses less digits than its factorization.

9925655551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157014 (or 157007 counting only the distinct ones).

The product of its digits is 3037500, while the sum is 52.

The square root of 9925655551 is about 99627.5842876861. The cubic root of 9925655551 is about 2149.0823955930.

The spelling of 9925655551 in words is "nine billion, nine hundred twenty-five million, six hundred fifty-five thousand, five hundred fifty-one".