551287640378 has 16 divisors (see below), whose sum is σ = 829597697280. Its totient is φ = 274756261200.

The previous prime is 551287640347. The next prime is 551287640381. The reversal of 551287640378 is 873046782155.

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, 635663 + ... + 1227453.

It is an arithmetic number, because the mean of its divisors is an integer number (51849856080).

Almost surely, 2^551287640378 is an apocalyptic number.

551287640378 is a deficient number, since it is larger than the sum of its proper divisors (278310056902).

551287640378 is a wasteful number, since it uses less digits than its factorization.

551287640378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593293.

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 551287640378 in words is "five hundred fifty-one billion, two hundred eighty-seven million, six hundred forty thousand, three hundred seventy-eight".