1215411420450 has 24 divisors (see below), whose sum is σ = 3014220323088. Its totient is φ = 324109712080.

The previous prime is 1215411420437. The next prime is 1215411420529. The reversal of 1215411420450 is 540241145121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4051371252 + ... + 4051371551.

It is an arithmetic number, because the mean of its divisors is an integer number (125592513462).

Almost surely, 2^{1215411420450} is an apocalyptic number.

1215411420450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215411420450 is an abundant number, since it is smaller than the sum of its proper divisors (1798808902638).

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

1215411420450 is a wasteful number, since it uses less digits than its factorization.

1215411420450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102742818 (or 8102742813 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 1215411420450 its reverse (540241145121), we get a palindrome (1755652565571).

The spelling of 1215411420450 in words is "one trillion, two hundred fifteen billion, four hundred eleven million, four hundred twenty thousand, four hundred fifty".