7655642140 has 24 divisors (see below), whose sum is σ = 16631223840. Its totient is φ = 2956661568.

The previous prime is 7655642131. The next prime is 7655642153. The reversal of 7655642140 is 412465567.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7655642093 and 7655642102.

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, 6599112 + ... + 6600271.

It is an arithmetic number, because the mean of its divisors is an integer number (692967660).

Almost surely, 2^7655642140 is an apocalyptic number.

It is an amenable number.

7655642140 is an abundant number, since it is smaller than the sum of its proper divisors (8975581700).

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

7655642140 is a wasteful number, since it uses less digits than its factorization.

7655642140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13199421 (or 13199419 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 7655642140 is about 87496.5264453395. The cubic root of 7655642140 is about 1970.8816293169.

The spelling of 7655642140 in words is "seven billion, six hundred fifty-five million, six hundred forty-two thousand, one hundred forty".