1220405503425 has 96 divisors (see below), whose sum is σ = 2196429062400. Its totient is φ = 595425116160.

The previous prime is 1220405503423. The next prime is 1220405503433. The reversal of 1220405503425 is 5243055040221.

It is a happy number.

It is not a de Polignac number, because 1220405503425 - 2¹ = 1220405503423 is a prime.

It is a super-4 number, since 4×1220405503425⁴ (a number of 49 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220405503423) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 47586756 + ... + 47612394.

It is an arithmetic number, because the mean of its divisors is an integer number (22879469400).

Almost surely, 2^{1220405503425} is an apocalyptic number.

1220405503425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220405503425 is a deficient number, since it is larger than the sum of its proper divisors (976023558975).

1220405503425 is a wasteful number, since it uses less digits than its factorization.

1220405503425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26715 (or 26710 counting only the distinct ones).

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

The spelling of 1220405503425 in words is "one trillion, two hundred twenty billion, four hundred five million, five hundred three thousand, four hundred twenty-five".