7278372657 has 12 divisors (see below), whose sum is σ = 10514584704. Its totient is φ = 4851611640.

The previous prime is 7278372653. The next prime is 7278372679. The reversal of 7278372657 is 7562738727.

It is a happy number.

It is not a de Polignac number, because 7278372657 - 2² = 7278372653 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7278372653) 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 11 ways as a sum of consecutive naturals, for example, 25432 + ... + 123302.

It is an arithmetic number, because the mean of its divisors is an integer number (876215392).

Almost surely, 2^7278372657 is an apocalyptic number.

It is an amenable number.

7278372657 is a deficient number, since it is larger than the sum of its proper divisors (3236212047).

7278372657 is a wasteful number, since it uses less digits than its factorization.

7278372657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106140 (or 106137 counting only the distinct ones).

The product of its digits is 6914880, while the sum is 54.

The square root of 7278372657 is about 85313.3791207452. The cubic root of 7278372657 is about 1937.9597938219.

The spelling of 7278372657 in words is "seven billion, two hundred seventy-eight million, three hundred seventy-two thousand, six hundred fifty-seven".