1551153121005 has 16 divisors (see below), whose sum is σ = 2485933714944. Its totient is φ = 825918757440.

The previous prime is 1551153120997. The next prime is 1551153121009. The reversal of 1551153121005 is 5001213511551.

It is not a de Polignac number, because 1551153121005 - 2³ = 1551153120997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551153121009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85172286 + ... + 85190495.

It is an arithmetic number, because the mean of its divisors is an integer number (155370857184).

Almost surely, 2^{1551153121005} is an apocalyptic number.

1551153121005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1551153121005 is a deficient number, since it is larger than the sum of its proper divisors (934780593939).

1551153121005 is a wasteful number, since it uses less digits than its factorization.

1551153121005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170363396.

The product of its (nonzero) digits is 3750, while the sum is 30.

Adding to 1551153121005 its reverse (5001213511551), we get a palindrome (6552366632556).

The spelling of 1551153121005 in words is "one trillion, five hundred fifty-one billion, one hundred fifty-three million, one hundred twenty-one thousand, five".