5451631926129 has 27 divisors (see below), whose sum is σ = 7971447072043. Its totient is φ = 3590250156672.

The previous prime is 5451631926049. The next prime is 5451631926241. The reversal of 5451631926129 is 9216291361545.

It is a happy number.

The square root of 5451631926129 is 2334873.

It is a perfect power (a square), and thus also a powerful number.

5451631926129 is a `hidden beast` number, since 5 + 4 + 5 + 1 + 6 + 3 + 19 + 2 + 612 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 597753191025 + 4853878735104 = 773145^2 + 2203152^2 .

It is not a de Polignac number, because 5451631926129 - 2⁹ = 5451631925617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5451631926929) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 581378689 + ... + 581388065.

Almost surely, 2^{5451631926129} is an apocalyptic number.

5451631926129 is the 2334873-rd square number.

5451631926129 is the 1167437-th centered octagonal number.

It is an amenable number.

5451631926129 is a deficient number, since it is larger than the sum of its proper divisors (2519815145914).

5451631926129 is an frugal number, since it uses more digits than its factorization.

5451631926129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18926 (or 9463 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The spelling of 5451631926129 in words is "five trillion, four hundred fifty-one billion, six hundred thirty-one million, nine hundred twenty-six thousand, one hundred twenty-nine".