1220651532432 has 80 divisors (see below), whose sum is σ = 3504198028480. Its totient is φ = 406828562688.

The previous prime is 1220651532431. The next prime is 1220651532461. The reversal of 1220651532432 is 2342351560221.

1220651532432 is a `hidden beast` number, since 1 + 2 + 20 + 65 + 1 + 532 + 43 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1220651532431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3054828 + ... + 3431220.

It is an arithmetic number, because the mean of its divisors is an integer number (43802475356).

Almost surely, 2^{1220651532432} is an apocalyptic number.

1220651532432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220651532432 is an abundant number, since it is smaller than the sum of its proper divisors (2283546496048).

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

1220651532432 is a wasteful number, since it uses less digits than its factorization.

1220651532432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383917 (or 383905 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 1220651532432 in words is "one trillion, two hundred twenty billion, six hundred fifty-one million, five hundred thirty-two thousand, four hundred thirty-two".