1554542020553 has 4 divisors (see below), whose sum is σ = 1554544531200. Its totient is φ = 1554539509908.

The previous prime is 1554542020541. The next prime is 1554542020561. The reversal of 1554542020553 is 3550202454551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1554542020553 - 2⁶ = 1554542020489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1554542020553.

It is not an unprimeable number, because it can be changed into a prime (1554542020513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408776 + ... + 1810022.

It is an arithmetic number, because the mean of its divisors is an integer number (388636132800).

Almost surely, 2^{1554542020553} is an apocalyptic number.

It is an amenable number.

1554542020553 is a deficient number, since it is larger than the sum of its proper divisors (2510647).

1554542020553 is a wasteful number, since it uses less digits than its factorization.

1554542020553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510646.

The product of its (nonzero) digits is 600000, while the sum is 41.

The spelling of 1554542020553 in words is "one trillion, five hundred fifty-four billion, five hundred forty-two million, twenty thousand, five hundred fifty-three".