2651620556 has 12 divisors (see below), whose sum is σ = 4997284992. Its totient is φ = 1223824848.

The previous prime is 2651620553. The next prime is 2651620583. The reversal of 2651620556 is 6550261562.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2651620553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25496300 + ... + 25496403.

It is an arithmetic number, because the mean of its divisors is an integer number (416440416).

Almost surely, 2^2651620556 is an apocalyptic number.

2651620556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2651620556 is a deficient number, since it is larger than the sum of its proper divisors (2345664436).

2651620556 is a wasteful number, since it uses less digits than its factorization.

2651620556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50992720 (or 50992718 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 2651620556 is about 51493.8885305820. Note that the first 3 decimals coincide. The cubic root of 2651620556 is about 1384.1095304351.

The spelling of 2651620556 in words is "two billion, six hundred fifty-one million, six hundred twenty thousand, five hundred fifty-six".