22156561633550 has 24 divisors (see below), whose sum is σ = 41215180065600. Its totient is φ = 8861769722880.

The previous prime is 22156561633537. The next prime is 22156561633573. The reversal of 22156561633550 is 5533616565122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20849630 + ... + 21886529.

It is an arithmetic number, because the mean of its divisors is an integer number (1717299169400).

Almost surely, 2^{22156561633550} is an apocalyptic number.

22156561633550 is a deficient number, since it is larger than the sum of its proper divisors (19058618432050).

22156561633550 is a wasteful number, since it uses less digits than its factorization.

22156561633550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42746540 (or 42746535 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 22156561633550 in words is "twenty-two trillion, one hundred fifty-six billion, five hundred sixty-one million, six hundred thirty-three thousand, five hundred fifty".