16400620552 has 32 divisors (see below), whose sum is σ = 31447183680. Its totient is φ = 8016356160.

The previous prime is 16400620549. The next prime is 16400620573. The reversal of 16400620552 is 25502600461.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23548 + ... + 182635.

It is an arithmetic number, because the mean of its divisors is an integer number (982724490).

Almost surely, 2^16400620552 is an apocalyptic number.

It is an amenable number.

16400620552 is a deficient number, since it is larger than the sum of its proper divisors (15046563128).

16400620552 is a wasteful number, since it uses less digits than its factorization.

16400620552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206413 (or 206409 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 16400620552 in words is "sixteen billion, four hundred million, six hundred twenty thousand, five hundred fifty-two".