51161232021498 has 24 divisors (see below), whose sum is σ = 111946854229236. Its totient is φ = 16884895056000.

The previous prime is 51161232021491. The next prime is 51161232021499. The reversal of 51161232021498 is 89412023216115.

51161232021498 is a `hidden beast` number, since 5 + 1 + 1 + 612 + 3 + 2 + 0 + 21 + 4 + 9 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51014349159489 + 146882862009 = 7142433^2 + 383253^2 .

It is not an unprimeable number, because it can be changed into a prime (51161232021491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14070744063 + ... + 14070747698.

Almost surely, 2^{51161232021498} is an apocalyptic number.

51161232021498 is an abundant number, since it is smaller than the sum of its proper divisors (60785622207738).

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

51161232021498 is a wasteful number, since it uses less digits than its factorization.

51161232021498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28141491870 (or 28141491867 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 51161232021498 in words is "fifty-one trillion, one hundred sixty-one billion, two hundred thirty-two million, twenty-one thousand, four hundred ninety-eight".