11555378555425 has 12 divisors (see below), whose sum is σ = 14715930745276. Its totient is φ = 8994456820800.

The previous prime is 11555378555411. The next prime is 11555378555431. The reversal of 11555378555425 is 52455587355511.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2036123517184 + 9519255038241 = 1426928^2 + 3085329^2 .

It is not a de Polignac number, because 11555378555425 - 2⁴³ = 2759285533217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6246149646 + ... + 6246151495.

Almost surely, 2^{11555378555425} is an apocalyptic number.

It is an amenable number.

11555378555425 is a deficient number, since it is larger than the sum of its proper divisors (3160552189851).

11555378555425 is a wasteful number, since it uses less digits than its factorization.

11555378555425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12492301188 (or 12492301183 counting only the distinct ones).

The product of its digits is 105000000, while the sum is 61.

The spelling of 11555378555425 in words is "eleven trillion, five hundred fifty-five billion, three hundred seventy-eight million, five hundred fifty-five thousand, four hundred twenty-five".