7696427781 has 16 divisors (see below), whose sum is σ = 11802594944. Its totient is φ = 4369944384.

The previous prime is 7696427777. The next prime is 7696427789. The reversal of 7696427781 is 1877246967.

It is not a de Polignac number, because 7696427781 - 2² = 7696427777 is a prime.

It is a super-2 number, since 2×7696427781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7696427789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1163890 + ... + 1170483.

It is an arithmetic number, because the mean of its divisors is an integer number (737662184).

Almost surely, 2^7696427781 is an apocalyptic number.

It is an amenable number.

7696427781 is a deficient number, since it is larger than the sum of its proper divisors (4106167163).

7696427781 is a wasteful number, since it uses less digits than its factorization.

7696427781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334540.

The product of its digits is 7112448, while the sum is 57.

The square root of 7696427781 is about 87729.2869057990. The cubic root of 7696427781 is about 1974.3754073434.

The spelling of 7696427781 in words is "seven billion, six hundred ninety-six million, four hundred twenty-seven thousand, seven hundred eighty-one".