7121537620 has 24 divisors (see below), whose sum is σ = 15437657088. Its totient is φ = 2756724000.

The previous prime is 7121537551. The next prime is 7121537629. The reversal of 7121537620 is 267351217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121537629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5742556 + ... + 5743795.

It is an arithmetic number, because the mean of its divisors is an integer number (643235712).

Almost surely, 2^7121537620 is an apocalyptic number.

It is an amenable number.

7121537620 is an abundant number, since it is smaller than the sum of its proper divisors (8316119468).

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

7121537620 is a wasteful number, since it uses less digits than its factorization.

7121537620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11486391 (or 11486389 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 7121537620 is about 84389.2032193692. The cubic root of 7121537620 is about 1923.9388198526.

Adding to 7121537620 its reverse (267351217), we get a palindrome (7388888837).

The spelling of 7121537620 in words is "seven billion, one hundred twenty-one million, five hundred thirty-seven thousand, six hundred twenty".