7268978157 has 24 divisors (see below), whose sum is σ = 11377792800. Its totient is φ = 4115585376.

The previous prime is 7268978149. The next prime is 7268978159. The reversal of 7268978157 is 7518798627.

It is not a de Polignac number, because 7268978157 - 2³ = 7268978149 is a prime.

It is a super-3 number, since 3×7268978157³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7268978157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7268978159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210807 + ... + 242852.

It is an arithmetic number, because the mean of its divisors is an integer number (474074700).

Almost surely, 2^7268978157 is an apocalyptic number.

It is an amenable number.

7268978157 is a deficient number, since it is larger than the sum of its proper divisors (4108814643).

7268978157 is a wasteful number, since it uses less digits than its factorization.

7268978157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453785 (or 453778 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 60.

The square root of 7268978157 is about 85258.3025693099. The cubic root of 7268978157 is about 1937.1256329036.

The spelling of 7268978157 in words is "seven billion, two hundred sixty-eight million, nine hundred seventy-eight thousand, one hundred fifty-seven".