1556826345 has 16 divisors (see below), whose sum is σ = 2767691520. Its totient is φ = 830307312.

The previous prime is 1556826329. The next prime is 1556826347. The reversal of 1556826345 is 5436286551.

1556826345 is a `hidden beast` number, since 1 + 5 + 5 + 6 + 8 + 2 + 634 + 5 = 666.

1556826345 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1556826345 - 2⁴ = 1556826329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1556826345.

It is not an unprimeable number, because it can be changed into a prime (1556826347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5765889 + ... + 5766158.

It is an arithmetic number, because the mean of its divisors is an integer number (172980720).

Almost surely, 2^1556826345 is an apocalyptic number.

1556826345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1556826345 is a deficient number, since it is larger than the sum of its proper divisors (1210865175).

1556826345 is a wasteful number, since it uses less digits than its factorization.

1556826345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11532061 (or 11532055 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 1556826345 is about 39456.6387950114. The cubic root of 1556826345 is about 1158.9909836977.

The spelling of 1556826345 in words is "one billion, five hundred fifty-six million, eight hundred twenty-six thousand, three hundred forty-five".