1603620961272 has 384 divisors, whose sum is σ = 4958104032000. Its totient is φ = 476250762240.

The previous prime is 1603620961177. The next prime is 1603620961279. The reversal of 1603620961272 is 2721690263061.

1603620961272 is a `hidden beast` number, since 1 + 6 + 0 + 3 + 6 + 20 + 9 + 612 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603620961279) 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, 2616020838 + ... + 2616021450.

It is an arithmetic number, because the mean of its divisors is an integer number (12911729250).

Almost surely, 2^{1603620961272} is an apocalyptic number.

1603620961272 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 1603620961272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2479052016000).

1603620961272 is an abundant number, since it is smaller than the sum of its proper divisors (3354483070728).

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

1603620961272 is a wasteful number, since it uses less digits than its factorization.

1603620961272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 1603620961272 in words is "one trillion, six hundred three billion, six hundred twenty million, nine hundred sixty-one thousand, two hundred seventy-two".