16235237557551 has 32 divisors (see below), whose sum is σ = 21972991575808. Its totient is φ = 10660895688960.

The previous prime is 16235237557549. The next prime is 16235237557571. The reversal of 16235237557551 is 15575573253261.

It is not a de Polignac number, because 16235237557551 - 2¹ = 16235237557549 is a prime.

It is a super-2 number, since 2×16235237557551² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16235237557491 and 16235237557500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16235237557571) 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, 527839665 + ... + 527870421.

It is an arithmetic number, because the mean of its divisors is an integer number (686655986744).

Almost surely, 2^{16235237557551} is an apocalyptic number.

16235237557551 is a deficient number, since it is larger than the sum of its proper divisors (5737754018257).

16235237557551 is a wasteful number, since it uses less digits than its factorization.

16235237557551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33991.

The product of its digits is 33075000, while the sum is 57.

The spelling of 16235237557551 in words is "sixteen trillion, two hundred thirty-five billion, two hundred thirty-seven million, five hundred fifty-seven thousand, five hundred fifty-one".