7471661648 has 40 divisors (see below), whose sum is σ = 15948773856. Its totient is φ = 3362576000.

The previous prime is 7471661629. The next prime is 7471661683. The reversal of 7471661648 is 8461661747.

It is a junction number, because it is equal to n+sod(n) for n = 7471661596 and 7471661605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192386 + ... + 227937.

Almost surely, 2^7471661648 is an apocalyptic number.

It is an amenable number.

7471661648 is an abundant number, since it is smaller than the sum of its proper divisors (8477112208).

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

7471661648 is a wasteful number, since it uses less digits than its factorization.

7471661648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420443 (or 420437 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 50.

The square root of 7471661648 is about 86438.7739848270. The cubic root of 7471661648 is about 1954.9653557090.

Subtracting 7471661648 from its reverse (8461661747), we obtain a palindrome (990000099).

The spelling of 7471661648 in words is "seven billion, four hundred seventy-one million, six hundred sixty-one thousand, six hundred forty-eight".