1220504532540 has 192 divisors, whose sum is σ = 3623345187840. Its totient is φ = 306107043840.

The previous prime is 1220504532529. The next prime is 1220504532551. The reversal of 1220504532540 is 452354050221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220504532529) and next prime (1220504532551).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 277953745 + ... + 277958135.

It is an arithmetic number, because the mean of its divisors is an integer number (18871589520).

Almost surely, 2^{1220504532540} is an apocalyptic number.

1220504532540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220504532540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811672593920).

1220504532540 is an abundant number, since it is smaller than the sum of its proper divisors (2402840655300).

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

1220504532540 is a wasteful number, since it uses less digits than its factorization.

1220504532540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132 (or 6130 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 1220504532540 its reverse (452354050221), we get a palindrome (1672858582761).

The spelling of 1220504532540 in words is "one trillion, two hundred twenty billion, five hundred four million, five hundred thirty-two thousand, five hundred forty".