1545144643554 has 16 divisors (see below), whose sum is σ = 3173810619648. Its totient is φ = 501127992432.

The previous prime is 1545144643543. The next prime is 1545144643577. The reversal of 1545144643554 is 4553464415451.

It is a junction number, because it is equal to n+sod(n) for n = 1545144643497 and 1545144643506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3480055282 + ... + 3480055725.

It is an arithmetic number, because the mean of its divisors is an integer number (198363163728).

Almost surely, 2^{1545144643554} is an apocalyptic number.

1545144643554 is an abundant number, since it is smaller than the sum of its proper divisors (1628665976094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1545144643554 is a wasteful number, since it uses less digits than its factorization.

1545144643554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960111049.

The product of its digits is 11520000, while the sum is 51.

The spelling of 1545144643554 in words is "one trillion, five hundred forty-five billion, one hundred forty-four million, six hundred forty-three thousand, five hundred fifty-four".