1620614861250 has 960 divisors, whose sum is σ = 5335316152320. Its totient is φ = 320760000000.

The previous prime is 1620614861221. The next prime is 1620614861293. The reversal of 1620614861250 is 521684160261.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 10732548675 + ... + 10732548825.

It is an arithmetic number, because the mean of its divisors is an integer number (5557620992).

Almost surely, 2^{1620614861250} is an apocalyptic number.

1620614861250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620614861250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2667658076160).

1620614861250 is an abundant number, since it is smaller than the sum of its proper divisors (3714701291070).

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

1620614861250 is a wasteful number, since it uses less digits than its factorization.

1620614861250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 1620614861250 in words is "one trillion, six hundred twenty billion, six hundred fourteen million, eight hundred sixty-one thousand, two hundred fifty".