1215550554554 has 16 divisors (see below), whose sum is σ = 2083841527488. Its totient is φ = 520940093472.

The previous prime is 1215550554509. The next prime is 1215550554571. The reversal of 1215550554554 is 4554550555121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1215550554499 and 1215550554508.

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, 76604 + ... + 1561079.

It is an arithmetic number, because the mean of its divisors is an integer number (130240095468).

Almost surely, 2^{1215550554554} is an apocalyptic number.

1215550554554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1215550554554 is a deficient number, since it is larger than the sum of its proper divisors (868290972934).

1215550554554 is a wasteful number, since it uses less digits than its factorization.

1215550554554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690709.

The product of its (nonzero) digits is 2500000, while the sum is 47.

The spelling of 1215550554554 in words is "one trillion, two hundred fifteen billion, five hundred fifty million, five hundred fifty-four thousand, five hundred fifty-four".