15455552775 has 72 divisors (see below), whose sum is σ = 27946287216. Its totient is φ = 7532928000.

The previous prime is 15455552767. The next prime is 15455552797. The reversal of 15455552775 is 57725555451.

It is not a de Polignac number, because 15455552775 - 2³ = 15455552767 is a prime.

It is a super-2 number, since 2×15455552775² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1274139 + ... + 1286211.

It is an arithmetic number, because the mean of its divisors is an integer number (388142878).

Almost surely, 2^15455552775 is an apocalyptic number.

15455552775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15455552775 is a deficient number, since it is larger than the sum of its proper divisors (12490734441).

15455552775 is a wasteful number, since it uses less digits than its factorization.

15455552775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12213 (or 12195 counting only the distinct ones).

The product of its digits is 6125000, while the sum is 51.

The spelling of 15455552775 in words is "fifteen billion, four hundred fifty-five million, five hundred fifty-two thousand, seven hundred seventy-five".