1622147556 has 12 divisors (see below), whose sum is σ = 3785010992. Its totient is φ = 540715848.

The previous prime is 1622147543. The next prime is 1622147557. The reversal of 1622147556 is 6557412261.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1622147557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67589470 + ... + 67589493.

Almost surely, 2^1622147556 is an apocalyptic number.

It is an amenable number.

1622147556 is an abundant number, since it is smaller than the sum of its proper divisors (2162863436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1622147556 is a wasteful number, since it uses less digits than its factorization.

1622147556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135178970 (or 135178968 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 1622147556 is about 40275.8929882380. The cubic root of 1622147556 is about 1174.9790383464.

The spelling of 1622147556 in words is "one billion, six hundred twenty-two million, one hundred forty-seven thousand, five hundred fifty-six".