1254563542155 has 48 divisors (see below), whose sum is σ = 2547299349504. Its totient is φ = 521377053120.

The previous prime is 1254563542139. The next prime is 1254563542189. The reversal of 1254563542155 is 5512453654521.

It is not a de Polignac number, because 1254563542155 - 2⁴ = 1254563542139 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77577787 + ... + 77593956.

It is an arithmetic number, because the mean of its divisors is an integer number (53068736448).

Almost surely, 2^{1254563542155} is an apocalyptic number.

1254563542155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1254563542155 is an abundant number, since it is smaller than the sum of its proper divisors (1292735807349).

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

1254563542155 is a wasteful number, since it uses less digits than its factorization.

1254563542155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155171776 (or 155171769 counting only the distinct ones).

The product of its digits is 3600000, while the sum is 48.

The spelling of 1254563542155 in words is "one trillion, two hundred fifty-four billion, five hundred sixty-three million, five hundred forty-two thousand, one hundred fifty-five".