1556420002 has 16 divisors (see below), whose sum is σ = 2428094592. Its totient is φ = 747648720.

The previous prime is 1556419961. The next prime is 1556420003. The reversal of 1556420002 is 2000246551.

It is not an unprimeable number, because it can be changed into a prime (1556420003) 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, 143098 + ... + 153589.

It is an arithmetic number, because the mean of its divisors is an integer number (151755912).

Almost surely, 2^1556420002 is an apocalyptic number.

1556420002 is a deficient number, since it is larger than the sum of its proper divisors (871674590).

1556420002 is a wasteful number, since it uses less digits than its factorization.

1556420002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296793.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1556420002 is about 39451.4892241091. The cubic root of 1556420002 is about 1158.8901398979.

Adding to 1556420002 its reverse (2000246551), we get a palindrome (3556666553).

The spelling of 1556420002 in words is "one billion, five hundred fifty-six million, four hundred twenty thousand, two".