72351550540 has 24 divisors (see below), whose sum is σ = 151953126192. Its totient is φ = 28937787840.

The previous prime is 72351550511. The next prime is 72351550549. The reversal of 72351550540 is 4505515327.

It is a self number, because there is not a number n which added to its sum of digits gives 72351550540.

It is not an unprimeable number, because it can be changed into a prime (72351550549) 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, 38862 + ... + 382378.

It is an arithmetic number, because the mean of its divisors is an integer number (6331380258).

Almost surely, 2^72351550540 is an apocalyptic number.

It is an amenable number.

72351550540 is an abundant number, since it is smaller than the sum of its proper divisors (79601575652).

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

72351550540 is a wasteful number, since it uses less digits than its factorization.

72351550540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354057 (or 354055 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 37.

The spelling of 72351550540 in words is "seventy-two billion, three hundred fifty-one million, five hundred fifty thousand, five hundred forty".