7656417940 has 12 divisors (see below), whose sum is σ = 16078477716. Its totient is φ = 3062567168.

The previous prime is 7656417889. The next prime is 7656417947. The reversal of 7656417940 is 497146567.

It can be written as a sum of positive squares in 2 ways, for example, as 5374062864 + 2282355076 = 73308^2 + 47774^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7656417947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191410429 + ... + 191410468.

It is an arithmetic number, because the mean of its divisors is an integer number (1339873143).

Almost surely, 2^7656417940 is an apocalyptic number.

It is an amenable number.

7656417940 is an abundant number, since it is smaller than the sum of its proper divisors (8422059776).

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

7656417940 is a wasteful number, since it uses less digits than its factorization.

7656417940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382820906 (or 382820904 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

The square root of 7656417940 is about 87500.9596518804. The cubic root of 7656417940 is about 1970.9482014953.

The spelling of 7656417940 in words is "seven billion, six hundred fifty-six million, four hundred seventeen thousand, nine hundred forty".