1620725235792 has 160 divisors (see below), whose sum is σ = 4820526966528. Its totient is φ = 464793182208.

The previous prime is 1620725235791. The next prime is 1620725235799. The reversal of 1620725235792 is 2975325270261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620725235791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 350958 + ... + 1834290.

Almost surely, 2^{1620725235792} is an apocalyptic number.

1620725235792 is a gapful number since it is divisible by the number (12) 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 1620725235792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2410263483264).

1620725235792 is an abundant number, since it is smaller than the sum of its proper divisors (3199801730736).

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

1620725235792 is a wasteful number, since it uses less digits than its factorization.

1620725235792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483477 (or 1483471 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 1620725235792 in words is "one trillion, six hundred twenty billion, seven hundred twenty-five million, two hundred thirty-five thousand, seven hundred ninety-two".