1215090554990 has 256 divisors, whose sum is σ = 2620103915520. Its totient is φ = 401786542080.

The previous prime is 1215090554929. The next prime is 1215090554999. The reversal of 1215090554990 is 994550905121.

It is a super-3 number, since 3×1215090554990³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215090554999) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1498261685 + ... + 1498262495.

It is an arithmetic number, because the mean of its divisors is an integer number (10234780920).

Almost surely, 2^{1215090554990} is an apocalyptic number.

1215090554990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215090554990 is an abundant number, since it is smaller than the sum of its proper divisors (1405013360530).

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

1215090554990 is a wasteful number, since it uses less digits than its factorization.

1215090554990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387.

The product of its (nonzero) digits is 729000, while the sum is 50.

The spelling of 1215090554990 in words is "one trillion, two hundred fifteen billion, ninety million, five hundred fifty-four thousand, nine hundred ninety".