1125778087551 has 32 divisors (see below), whose sum is σ = 1664000110080. Its totient is φ = 672623086464.

The previous prime is 1125778087547. The next prime is 1125778087571. The reversal of 1125778087551 is 1557808775211.

It is not a de Polignac number, because 1125778087551 - 2² = 1125778087547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1125778087491 and 1125778087500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125778087571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1729836 + ... + 2289953.

It is an arithmetic number, because the mean of its divisors is an integer number (52000003440).

Almost surely, 2^{1125778087551} is an apocalyptic number.

1125778087551 is a deficient number, since it is larger than the sum of its proper divisors (538222022529).

1125778087551 is a wasteful number, since it uses less digits than its factorization.

1125778087551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020015.

The product of its (nonzero) digits is 5488000, while the sum is 57.

The spelling of 1125778087551 in words is "one trillion, one hundred twenty-five billion, seven hundred seventy-eight million, eighty-seven thousand, five hundred fifty-one".