7216655040 has 448 divisors, whose sum is σ = 30811622400. Its totient is φ = 1552269312.

The previous prime is 7216655029. The next prime is 7216655063. The reversal of 7216655040 is 405566127.

It is a happy number.

7216655040 is a `hidden beast` number, since 7 + 2 + 1 + 66 + 550 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7216654986 and 7216655004.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1024651 + ... + 1031669.

Almost surely, 2^7216655040 is an apocalyptic number.

7216655040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7216655040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15405811200).

7216655040 is an abundant number, since it is smaller than the sum of its proper divisors (23594967360).

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

7216655040 is a wasteful number, since it uses less digits than its factorization.

7216655040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7069 (or 7053 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 7216655040 is about 84950.8978175040. The cubic root of 7216655040 is about 1932.4665359959.

The spelling of 7216655040 in words is "seven billion, two hundred sixteen million, six hundred fifty-five thousand, forty".