7651224540 has 36 divisors (see below), whose sum is σ = 23208714984. Its totient is φ = 2040326496.

The previous prime is 7651224533. The next prime is 7651224547. The reversal of 7651224540 is 454221567.

It is a happy number.

7651224540 is a `hidden beast` number, since 76 + 512 + 24 + 54 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (7651224533) and next prime (7651224547).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×7651224540² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7651224495 and 7651224504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7651224547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21253222 + ... + 21253581.

Almost surely, 2^7651224540 is an apocalyptic number.

It is an amenable number.

7651224540 is an abundant number, since it is smaller than the sum of its proper divisors (15557490444).

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

7651224540 is a wasteful number, since it uses less digits than its factorization.

7651224540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42506818 (or 42506813 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 7651224540 is about 87471.2783718176. The cubic root of 7651224540 is about 1970.5024648724.

The spelling of 7651224540 in words is "seven billion, six hundred fifty-one million, two hundred twenty-four thousand, five hundred forty".