7381477640 has 32 divisors (see below), whose sum is σ = 17013409560. Its totient is φ = 2880576000.

The previous prime is 7381477613. The next prime is 7381477651. The reversal of 7381477640 is 467741837.

It can be written as a sum of positive squares in 4 ways, for example, as 4922706244 + 2458771396 = 70162^2 + 49586^2 .

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, 2248811 + ... + 2252090.

Almost surely, 2^7381477640 is an apocalyptic number.

It is an amenable number.

7381477640 is an abundant number, since it is smaller than the sum of its proper divisors (9631931920).

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

7381477640 is a wasteful number, since it uses less digits than its factorization.

7381477640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500953 (or 4500949 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 47.

The square root of 7381477640 is about 85915.5261870635. The cubic root of 7381477640 is about 1947.0679265780.

The spelling of 7381477640 in words is "seven billion, three hundred eighty-one million, four hundred seventy-seven thousand, six hundred forty".