7221135737640 has 128 divisors (see below), whose sum is σ = 23635025251200. Its totient is φ = 1750414110720.

The previous prime is 7221135737617. The next prime is 7221135737663. The reversal of 7221135737640 is 467375311227.

It is an interprime number because it is at equal distance from previous prime (7221135737617) and next prime (7221135737663).

It is a self number, because there is not a number n which added to its sum of digits gives 7221135737640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14122284 + ... + 14624676.

It is an arithmetic number, because the mean of its divisors is an integer number (184648634775).

Almost surely, 2^{7221135737640} is an apocalyptic number.

It is an amenable number.

7221135737640 is an abundant number, since it is smaller than the sum of its proper divisors (16413889513560).

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

7221135737640 is a wasteful number, since it uses less digits than its factorization.

7221135737640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513307 (or 513303 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 48.

The spelling of 7221135737640 in words is "seven trillion, two hundred twenty-one billion, one hundred thirty-five million, seven hundred thirty-seven thousand, six hundred forty".