2131451268405 has 32 divisors (see below), whose sum is σ = 3477525592320. Its totient is φ = 1114591372800.

The previous prime is 2131451268377. The next prime is 2131451268439. The reversal of 2131451268405 is 5048621541312.

It is not a de Polignac number, because 2131451268405 - 2¹⁰ = 2131451267381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6673560 + ... + 6985649.

It is an arithmetic number, because the mean of its divisors is an integer number (108672674760).

Almost surely, 2^{2131451268405} is an apocalyptic number.

It is an amenable number.

2131451268405 is a deficient number, since it is larger than the sum of its proper divisors (1346074323915).

2131451268405 is a wasteful number, since it uses less digits than its factorization.

2131451268405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13659421.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 2131451268405 in words is "two trillion, one hundred thirty-one billion, four hundred fifty-one million, two hundred sixty-eight thousand, four hundred five".