551251243555 has 12 divisors (see below), whose sum is σ = 698149776672. Its totient is φ = 417790414800.

The previous prime is 551251243519. The next prime is 551251243577. The reversal of 551251243555 is 555342152155.

It is not a de Polignac number, because 551251243555 - 2²¹ = 551249146403 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152699371 + ... + 152702980.

It is an arithmetic number, because the mean of its divisors is an integer number (58179148056).

Almost surely, 2^551251243555 is an apocalyptic number.

551251243555 is a deficient number, since it is larger than the sum of its proper divisors (146898533117).

551251243555 is a wasteful number, since it uses less digits than its factorization.

551251243555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305402394 (or 305402375 counting only the distinct ones).

The product of its digits is 750000, while the sum is 43.

The spelling of 551251243555 in words is "five hundred fifty-one billion, two hundred fifty-one million, two hundred forty-three thousand, five hundred fifty-five".