1220504532534 has 144 divisors (see below), whose sum is σ = 3284567649792. Its totient is φ = 325796730336.

The previous prime is 1220504532529. The next prime is 1220504532551. The reversal of 1220504532534 is 4352354050221.

1220504532534 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 50 + 45 + 32 + 534 = 666.

It is a super-2 number, since 2×1220504532534² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 172707 + ... + 1571889.

It is an arithmetic number, because the mean of its divisors is an integer number (22809497568).

Almost surely, 2^{1220504532534} is an apocalyptic number.

1220504532534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220504532534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642283824896).

1220504532534 is an abundant number, since it is smaller than the sum of its proper divisors (2064063117258).

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

1220504532534 is a wasteful number, since it uses less digits than its factorization.

1220504532534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399271 (or 1399261 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 1220504532534 its reverse (4352354050221), we get a palindrome (5572858582755).

The spelling of 1220504532534 in words is "one trillion, two hundred twenty billion, five hundred four million, five hundred thirty-two thousand, five hundred thirty-four".