551767657440 has 48 divisors (see below), whose sum is σ = 1738068122448. Its totient is φ = 147138041856.

The previous prime is 551767657429. The next prime is 551767657531. The reversal of 551767657440 is 44756767155.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574757497 + ... + 574758456.

It is an arithmetic number, because the mean of its divisors is an integer number (36209752551).

Almost surely, 2^551767657440 is an apocalyptic number.

It is an amenable number.

551767657440 is an abundant number, since it is smaller than the sum of its proper divisors (1186300465008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551767657440 is a wasteful number, since it uses less digits than its factorization.

551767657440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149515971 (or 1149515963 counting only the distinct ones).

The product of its (nonzero) digits is 24696000, while the sum is 57.

The spelling of 551767657440 in words is "five hundred fifty-one billion, seven hundred sixty-seven million, six hundred fifty-seven thousand, four hundred forty".