7540078356 has 18 divisors (see below), whose sum is σ = 19059642602. Its totient is φ = 2513359440.

The previous prime is 7540078349. The next prime is 7540078373. The reversal of 7540078356 is 6538700457.

7540078356 is a `hidden beast` number, since 7 + 540 + 0 + 78 + 35 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7050960900 + 489117456 = 83970^2 + 22116^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×7540078356² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104723275 + ... + 104723346.

Almost surely, 2^7540078356 is an apocalyptic number.

It is an amenable number.

7540078356 is an abundant number, since it is smaller than the sum of its proper divisors (11519564246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7540078356 is a wasteful number, since it uses less digits than its factorization.

7540078356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209446631 (or 209446626 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 7540078356 is about 86833.6245702090. The cubic root of 7540078356 is about 1960.9143273279.

The spelling of 7540078356 in words is "seven billion, five hundred forty million, seventy-eight thousand, three hundred fifty-six".