15545441455 has 8 divisors (see below), whose sum is σ = 18662075712. Its totient is φ = 12431322528.

The previous prime is 15545441449. The next prime is 15545441473. The reversal of 15545441455 is 55414454551.

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 15545441455 - 2⁵ = 15545441423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615207 + ... + 639976.

It is an arithmetic number, because the mean of its divisors is an integer number (2332759464).

Almost surely, 2^15545441455 is an apocalyptic number.

15545441455 is a deficient number, since it is larger than the sum of its proper divisors (3116634257).

15545441455 is a wasteful number, since it uses less digits than its factorization.

15545441455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257665.

The product of its digits is 800000, while the sum is 43.

The spelling of 15545441455 in words is "fifteen billion, five hundred forty-five million, four hundred forty-one thousand, four hundred fifty-five".