7721049144 has 32 divisors (see below), whose sum is σ = 19327770000. Its totient is φ = 2570330112.

The previous prime is 7721049071. The next prime is 7721049173. The reversal of 7721049144 is 4419401277.

It is a super-2 number, since 2×7721049144² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190719 + ... + 227630.

Almost surely, 2^7721049144 is an apocalyptic number.

It is an amenable number.

7721049144 is an abundant number, since it is smaller than the sum of its proper divisors (11606720856).

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

7721049144 is a wasteful number, since it uses less digits than its factorization.

7721049144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419127 (or 419123 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 7721049144 is about 87869.5006472667. The cubic root of 7721049144 is about 1976.4785504936.

The spelling of 7721049144 in words is "seven billion, seven hundred twenty-one million, forty-nine thousand, one hundred forty-four".