2009459916556 has 72 divisors (see below), whose sum is σ = 3621555763056. Its totient is φ = 975359024640.

The previous prime is 2009459916553. The next prime is 2009459916559. The reversal of 2009459916556 is 6556199549002.

It is an interprime number because it is at equal distance from previous prime (2009459916553) and next prime (2009459916559).

It is a super-2 number, since 2×2009459916556² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2009459916494 and 2009459916503.

It is not an unprimeable number, because it can be changed into a prime (2009459916553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 616964880 + ... + 616968136.

It is an arithmetic number, because the mean of its divisors is an integer number (50299385598).

Almost surely, 2^{2009459916556} is an apocalyptic number.

It is an amenable number.

2009459916556 is a deficient number, since it is larger than the sum of its proper divisors (1612095846500).

2009459916556 is a wasteful number, since it uses less digits than its factorization.

2009459916556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719 (or 3590 counting only the distinct ones).

The product of its (nonzero) digits is 26244000, while the sum is 61.

The spelling of 2009459916556 in words is "two trillion, nine billion, four hundred fifty-nine million, nine hundred sixteen thousand, five hundred fifty-six".