551551251377 has 4 divisors (see below), whose sum is σ = 630344287296. Its totient is φ = 472758215460.

The previous prime is 551551251323. The next prime is 551551251431. The reversal of 551551251377 is 773152155155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (551551251323) and next prime (551551251431).

It is a cyclic number.

It is not a de Polignac number, because 551551251377 - 2¹⁸ = 551550989233 is a prime.

It is a super-2 number, since 2×551551251377² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551551251077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39396517949 + ... + 39396517962.

It is an arithmetic number, because the mean of its divisors is an integer number (157586071824).

Almost surely, 2^551551251377 is an apocalyptic number.

It is an amenable number.

551551251377 is a deficient number, since it is larger than the sum of its proper divisors (78793035919).

551551251377 is an equidigital number, since it uses as much as digits as its factorization.

551551251377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78793035918.

The product of its digits is 918750, while the sum is 47.

The spelling of 551551251377 in words is "five hundred fifty-one billion, five hundred fifty-one million, two hundred fifty-one thousand, three hundred seventy-seven".