7740378461 has 4 divisors (see below), whose sum is σ = 7744941372. Its totient is φ = 7735815552.

The previous prime is 7740378433. The next prime is 7740378463. The reversal of 7740378461 is 1648730477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7339177561 + 401200900 = 85669^2 + 20030^2 .

It is a cyclic number.

It is not a de Polignac number, because 7740378461 - 2³⁰ = 6666636637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7740378463) 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, 2278910 + ... + 2282303.

It is an arithmetic number, because the mean of its divisors is an integer number (1936235343).

Almost surely, 2^7740378461 is an apocalyptic number.

It is an amenable number.

7740378461 is a deficient number, since it is larger than the sum of its proper divisors (4562911).

7740378461 is a wasteful number, since it uses less digits than its factorization.

7740378461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562910.

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

The square root of 7740378461 is about 87979.4206675629. The cubic root of 7740378461 is about 1978.1265192830.

The spelling of 7740378461 in words is "seven billion, seven hundred forty million, three hundred seventy-eight thousand, four hundred sixty-one".