7740404505 has 12 divisors (see below), whose sum is σ = 13416701220. Its totient is φ = 4128215712.

The previous prime is 7740404489. The next prime is 7740404513. The reversal of 7740404505 is 5054040477.

7740404505 is a `hidden beast` number, since 77 + 40 + 40 + 4 + 505 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4063680009 + 3676724496 = 63747^2 + 60636^2 .

It is not a de Polignac number, because 7740404505 - 2⁴ = 7740404489 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7740404505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86004450 + ... + 86004539.

It is an arithmetic number, because the mean of its divisors is an integer number (1118058435).

Almost surely, 2^7740404505 is an apocalyptic number.

It is an amenable number.

7740404505 is a deficient number, since it is larger than the sum of its proper divisors (5676296715).

7740404505 is a wasteful number, since it uses less digits than its factorization.

7740404505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172009000 (or 172008997 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 7740404505 is about 87979.5686793246. The cubic root of 7740404505 is about 1978.1287378769.

The spelling of 7740404505 in words is "seven billion, seven hundred forty million, four hundred four thousand, five hundred five".