551767657439978 has 16 divisors (see below), whose sum is σ = 951690403020480. Its totient is φ = 235021105622016.

The previous prime is 551767657439939. The next prime is 551767657440067. The reversal of 551767657439978 is 879934756767155.

It is a junction number, because it is equal to n+sod(n) for n = 551767657439893 and 551767657439902.

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, 120895628183 + ... + 120895632746.

It is an arithmetic number, because the mean of its divisors is an integer number (59480650188780).

Almost surely, 2^{551767657439978} is an apocalyptic number.

551767657439978 is a deficient number, since it is larger than the sum of its proper divisors (399922745580502).

551767657439978 is a wasteful number, since it uses less digits than its factorization.

551767657439978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241791261101.

The product of its digits is 84015792000, while the sum is 89.

The spelling of 551767657439978 in words is "five hundred fifty-one trillion, seven hundred sixty-seven billion, six hundred fifty-seven million, four hundred thirty-nine thousand, nine hundred seventy-eight".