1553512451121 has 12 divisors (see below), whose sum is σ = 2250741776400. Its totient is φ = 1032546038040.

The previous prime is 1553512451119. The next prime is 1553512451131. The reversal of 1553512451121 is 1211542153551.

1553512451121 is a `hidden beast` number, since 1 + 5 + 53 + 51 + 24 + 511 + 21 = 666.

It is not a de Polignac number, because 1553512451121 - 2¹ = 1553512451119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1553512451131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260740971 + ... + 260746928.

It is an arithmetic number, because the mean of its divisors is an integer number (187561814700).

Almost surely, 2^{1553512451121} is an apocalyptic number.

It is an amenable number.

1553512451121 is a deficient number, since it is larger than the sum of its proper divisors (697229325279).

1553512451121 is a wasteful number, since it uses less digits than its factorization.

1553512451121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521488236 (or 521488233 counting only the distinct ones).

The product of its digits is 30000, while the sum is 36.

The spelling of 1553512451121 in words is "one trillion, five hundred fifty-three billion, five hundred twelve million, four hundred fifty-one thousand, one hundred twenty-one".