16137533421 has 16 divisors (see below), whose sum is σ = 23923768320. Its totient is φ = 10751015520.

The previous prime is 16137533417. The next prime is 16137533429. The reversal of 16137533421 is 12433573161.

16137533421 is a `hidden beast` number, since 1 + 613 + 7 + 5 + 3 + 34 + 2 + 1 = 666.

It is not a de Polignac number, because 16137533421 - 2² = 16137533417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16137533429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163440 + ... + 242873.

It is an arithmetic number, because the mean of its divisors is an integer number (1495235520).

Almost surely, 2^16137533421 is an apocalyptic number.

It is an amenable number.

16137533421 is a deficient number, since it is larger than the sum of its proper divisors (7786234899).

16137533421 is a wasteful number, since it uses less digits than its factorization.

16137533421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407793 (or 407787 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The spelling of 16137533421 in words is "sixteen billion, one hundred thirty-seven million, five hundred thirty-three thousand, four hundred twenty-one".