16461556137 has 24 divisors (see below), whose sum is σ = 25957657544. Its totient is φ = 9991413504.

The previous prime is 16461556087. The next prime is 16461556157. The reversal of 16461556137 is 73165516461.

16461556137 is a `hidden beast` number, since 1 + 6 + 4 + 61 + 556 + 1 + 37 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61168041 + 16400388096 = 7821^2 + 128064^2 .

It is not a de Polignac number, because 16461556137 - 2⁶ = 16461556073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16461556092 and 16461556101.

It is not an unprimeable number, because it can be changed into a prime (16461556157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 955138 + ... + 972219.

Almost surely, 2^16461556137 is an apocalyptic number.

It is an amenable number.

16461556137 is a deficient number, since it is larger than the sum of its proper divisors (9496101407).

16461556137 is a wasteful number, since it uses less digits than its factorization.

16461556137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927449 (or 1927446 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 16461556137 in words is "sixteen billion, four hundred sixty-one million, five hundred fifty-six thousand, one hundred thirty-seven".