10551786778 has 32 divisors (see below), whose sum is σ = 17279438400. Its totient is φ = 4803401856.

The previous prime is 10551786769. The next prime is 10551786803. The reversal of 10551786778 is 87768715501.

It is a super-2 number, since 2×10551786778² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 964125 + ... + 975007.

It is an arithmetic number, because the mean of its divisors is an integer number (539982450).

Almost surely, 2^10551786778 is an apocalyptic number.

10551786778 is a deficient number, since it is larger than the sum of its proper divisors (6727651622).

10551786778 is a wasteful number, since it uses less digits than its factorization.

10551786778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11406.

The product of its (nonzero) digits is 3292800, while the sum is 55.

The spelling of 10551786778 in words is "ten billion, five hundred fifty-one million, seven hundred eighty-six thousand, seven hundred seventy-eight".