1556056630 has 16 divisors (see below), whose sum is σ = 2803803984. Its totient is φ = 621777760.

The previous prime is 1556056591. The next prime is 1556056639. The reversal of 1556056630 is 366506551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1556056630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556056639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70417 + ... + 89836.

It is an arithmetic number, because the mean of its divisors is an integer number (175237749).

Almost surely, 2^1556056630 is an apocalyptic number.

1556056630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1556056630 is a deficient number, since it is larger than the sum of its proper divisors (1247747354).

1556056630 is a wasteful number, since it uses less digits than its factorization.

1556056630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161231.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 1556056630 is about 39446.8836538452. The cubic root of 1556056630 is about 1158.7999455195.

The spelling of 1556056630 in words is "one billion, five hundred fifty-six million, fifty-six thousand, six hundred thirty".