1155778555502 has 4 divisors (see below), whose sum is σ = 1733667833256. Its totient is φ = 577889277750.

The previous prime is 1155778555429. The next prime is 1155778555531. The reversal of 1155778555502 is 2055558775511.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288944638874 + ... + 288944638877.

It is an arithmetic number, because the mean of its divisors is an integer number (433416958314).

Almost surely, 2^{1155778555502} is an apocalyptic number.

1155778555502 is a deficient number, since it is larger than the sum of its proper divisors (577889277754).

1155778555502 is an equidigital number, since it uses as much as digits as its factorization.

1155778555502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577889277753.

The product of its (nonzero) digits is 12250000, while the sum is 56.

The spelling of 1155778555502 in words is "one trillion, one hundred fifty-five billion, seven hundred seventy-eight million, five hundred fifty-five thousand, five hundred two".