1556116054 has 4 divisors (see below), whose sum is σ = 2334174084. Its totient is φ = 778058026.

The previous prime is 1556116043. The next prime is 1556116057. The reversal of 1556116054 is 4506116551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556116057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389029012 + ... + 389029015.

It is an arithmetic number, because the mean of its divisors is an integer number (583543521).

Almost surely, 2^1556116054 is an apocalyptic number.

1556116054 is a deficient number, since it is larger than the sum of its proper divisors (778058030).

1556116054 is an equidigital number, since it uses as much as digits as its factorization.

1556116054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778058029.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1556116054 is about 39447.6368620479. The cubic root of 1556116054 is about 1158.8146964076.

The spelling of 1556116054 in words is "one billion, five hundred fifty-six million, one hundred sixteen thousand, fifty-four".