7616427721 has 8 divisors (see below), whose sum is σ = 8706219264. Its totient is φ = 6527068800.

The previous prime is 7616427719. The next prime is 7616427739. The reversal of 7616427721 is 1277246167.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7616427721 - 2¹ = 7616427719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7616427751) 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, 69505 + ... + 141646.

It is an arithmetic number, because the mean of its divisors is an integer number (1088277408).

Almost surely, 2^7616427721 is an apocalyptic number.

It is an amenable number.

7616427721 is a deficient number, since it is larger than the sum of its proper divisors (1089791543).

7616427721 is a wasteful number, since it uses less digits than its factorization.

7616427721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216311.

The product of its digits is 197568, while the sum is 43.

The square root of 7616427721 is about 87272.1474526667. The cubic root of 7616427721 is about 1967.5107247599.

The spelling of 7616427721 in words is "seven billion, six hundred sixteen million, four hundred twenty-seven thousand, seven hundred twenty-one".