7390511821 has 16 divisors (see below), whose sum is σ = 9219483648. Its totient is φ = 5755503600.

The previous prime is 7390511801. The next prime is 7390511839. The reversal of 7390511821 is 1281150937.

It is not a de Polignac number, because 7390511821 - 2⁹ = 7390511309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7390511801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110376 + ... + 164206.

It is an arithmetic number, because the mean of its divisors is an integer number (576217728).

Almost surely, 2^7390511821 is an apocalyptic number.

It is an amenable number.

7390511821 is a deficient number, since it is larger than the sum of its proper divisors (1828971827).

7390511821 is a wasteful number, since it uses less digits than its factorization.

7390511821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55632.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 7390511821 is about 85968.0860610494. The cubic root of 7390511821 is about 1947.8619407130.

The spelling of 7390511821 in words is "seven billion, three hundred ninety million, five hundred eleven thousand, eight hundred twenty-one".