7489455278 has 4 divisors (see below), whose sum is σ = 11234182920. Its totient is φ = 3744727638.

The previous prime is 7489455271. The next prime is 7489455289. The reversal of 7489455278 is 8725549847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8725549847 = 7 ⋅1246507121.

It is a super-2 number, since 2×7489455278² (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 (7489455271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1872363818 + ... + 1872363821.

It is an arithmetic number, because the mean of its divisors is an integer number (2808545730).

Almost surely, 2^7489455278 is an apocalyptic number.

7489455278 is a deficient number, since it is larger than the sum of its proper divisors (3744727642).

7489455278 is a wasteful number, since it uses less digits than its factorization.

7489455278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3744727641.

The product of its digits is 22579200, while the sum is 59.

The square root of 7489455278 is about 86541.6389837863. The cubic root of 7489455278 is about 1956.5160305250.

The spelling of 7489455278 in words is "seven billion, four hundred eighty-nine million, four hundred fifty-five thousand, two hundred seventy-eight".