72071838550 has 48 divisors (see below), whose sum is σ = 136463645232. Its totient is φ = 28311926400.

The previous prime is 72071838529. The next prime is 72071838551. The reversal of 72071838550 is 5583817027.

It is a super-2 number, since 2×72071838550² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72071838550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72071838551) 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, 1973557 + ... + 2009743.

It is an arithmetic number, because the mean of its divisors is an integer number (2842992609).

Almost surely, 2^72071838550 is an apocalyptic number.

72071838550 is a deficient number, since it is larger than the sum of its proper divisors (64391806682).

72071838550 is a wasteful number, since it uses less digits than its factorization.

72071838550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36913 (or 36908 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 72071838550 in words is "seventy-two billion, seventy-one million, eight hundred thirty-eight thousand, five hundred fifty".