1551431443461 has 32 divisors (see below), whose sum is σ = 2175736847616. Its totient is φ = 982336320000.

The previous prime is 1551431443421. The next prime is 1551431443487. The reversal of 1551431443461 is 1643441341551.

It is not a de Polignac number, because 1551431443461 - 2¹⁰ = 1551431442437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551431443421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178560 + ... + 1770521.

It is an arithmetic number, because the mean of its divisors is an integer number (67991776488).

Almost surely, 2^{1551431443461} is an apocalyptic number.

It is an amenable number.

1551431443461 is a deficient number, since it is larger than the sum of its proper divisors (624305404155).

1551431443461 is a wasteful number, since it uses less digits than its factorization.

1551431443461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949293.

The product of its digits is 345600, while the sum is 42.

The spelling of 1551431443461 in words is "one trillion, five hundred fifty-one billion, four hundred thirty-one million, four hundred forty-three thousand, four hundred sixty-one".