4020552540 has 72 divisors (see below), whose sum is σ = 12223083600. Its totient is φ = 1069737984.

The previous prime is 4020552539. The next prime is 4020552541. The reversal of 4020552540 is 452550204.

4020552540 is a `hidden beast` number, since 40 + 20 + 552 + 54 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (4020552539) and next prime (4020552541).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020552541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55947 + ... + 105693.

It is an arithmetic number, because the mean of its divisors is an integer number (169765050).

Almost surely, 2^4020552540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4020552540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6111541800).

4020552540 is an abundant number, since it is smaller than the sum of its proper divisors (8202531060).

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

4020552540 is a wasteful number, since it uses less digits than its factorization.

4020552540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50211 (or 50206 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 4020552540 is about 63407.8271193707. The cubic root of 4020552540 is about 1590.1151690637.

The spelling of 4020552540 in words is "four billion, twenty million, five hundred fifty-two thousand, five hundred forty".