7539640920 has 128 divisors (see below), whose sum is σ = 28722470400. Its totient is φ = 1723344768.

The previous prime is 7539640907. The next prime is 7539640939. The reversal of 7539640920 is 290469357.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 491094 + ... + 506213.

It is an arithmetic number, because the mean of its divisors is an integer number (224394300).

Almost surely, 2^7539640920 is an apocalyptic number.

7539640920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7539640920 is an abundant number, since it is smaller than the sum of its proper divisors (21182829480).

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

7539640920 is a wasteful number, since it uses less digits than its factorization.

7539640920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997334 (or 997324 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 7539640920 is about 86831.1057167879. The cubic root of 7539640920 is about 1960.8764059223.

The spelling of 7539640920 in words is "seven billion, five hundred thirty-nine million, six hundred forty thousand, nine hundred twenty".