7261720550 has 48 divisors (see below), whose sum is σ = 15934313472. Its totient is φ = 2409415200.

The previous prime is 7261720549. The next prime is 7261720559. The reversal of 7261720550 is 550271627.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 7261720550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7261720559) 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, 323792 + ... + 345491.

It is an arithmetic number, because the mean of its divisors is an integer number (331964864).

Almost surely, 2^7261720550 is an apocalyptic number.

7261720550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

7261720550 is an abundant number, since it is smaller than the sum of its proper divisors (8672592922).

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

7261720550 is a wasteful number, since it uses less digits than its factorization.

7261720550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669333 (or 669328 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 7261720550 is about 85215.7294752559. The cubic root of 7261720550 is about 1936.4807197850.

The spelling of 7261720550 in words is "seven billion, two hundred sixty-one million, seven hundred twenty thousand, five hundred fifty".