15550425553 has 8 divisors (see below), whose sum is σ = 16747709888. Its totient is φ = 14353298064.

The previous prime is 15550425551. The next prime is 15550425571. The reversal of 15550425553 is 35552405551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15550425553 - 2¹ = 15550425551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15550425551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240826 + ... + 298492.

It is an arithmetic number, because the mean of its divisors is an integer number (2093463736).

Almost surely, 2^15550425553 is an apocalyptic number.

15550425553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15550425553 is a deficient number, since it is larger than the sum of its proper divisors (1197284335).

15550425553 is a wasteful number, since it uses less digits than its factorization.

15550425553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78423.

The product of its (nonzero) digits is 375000, while the sum is 40.

The spelling of 15550425553 in words is "fifteen billion, five hundred fifty million, four hundred twenty-five thousand, five hundred fifty-three".