2645473733140 has 72 divisors (see below), whose sum is σ = 6467827521960. Its totient is φ = 906273865728.

The previous prime is 2645473733137. The next prime is 2645473733171. The reversal of 2645473733140 is 413373745462.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 569378903184 + 2076094829956 = 754572^2 + 1440866^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83596 + ... + 2301724.

It is an arithmetic number, because the mean of its divisors is an integer number (89830937805).

Almost surely, 2^{2645473733140} is an apocalyptic number.

2645473733140 is a gapful number since it is divisible by the number (20) 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 2645473733140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3233913760980).

2645473733140 is an abundant number, since it is smaller than the sum of its proper divisors (3822353788820).

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

2645473733140 is a wasteful number, since it uses less digits than its factorization.

2645473733140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219369 (or 2219360 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 49.

The spelling of 2645473733140 in words is "two trillion, six hundred forty-five billion, four hundred seventy-three million, seven hundred thirty-three thousand, one hundred forty".