7072121550 has 96 divisors (see below), whose sum is σ = 19999157472. Its totient is φ = 1638420480.

The previous prime is 7072121531. The next prime is 7072121557. The reversal of 7072121550 is 551212707.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7072121557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73519 + ... + 139818.

It is an arithmetic number, because the mean of its divisors is an integer number (208324557).

Almost surely, 2^7072121550 is an apocalyptic number.

7072121550 is an abundant number, since it is smaller than the sum of its proper divisors (12927035922).

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

7072121550 is a wasteful number, since it uses less digits than its factorization.

7072121550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213382 (or 213377 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 7072121550 is about 84095.9068563982. The cubic root of 7072121550 is about 1919.4784417760.

The spelling of 7072121550 in words is "seven billion, seventy-two million, one hundred twenty-one thousand, five hundred fifty".