7502506645 has 4 divisors (see below), whose sum is σ = 9003007980. Its totient is φ = 6002005312.

The previous prime is 7502506619. The next prime is 7502506673. The reversal of 7502506645 is 5466052057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5466052057 = 26539 ⋅205963.

It can be written as a sum of positive squares in 2 ways, for example, as 4640470641 + 2862036004 = 68121^2 + 53498^2 .

It is a cyclic number.

It is not a de Polignac number, because 7502506645 - 2²¹ = 7500409493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7502506598 and 7502506607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750250660 + ... + 750250669.

It is an arithmetic number, because the mean of its divisors is an integer number (2250751995).

Almost surely, 2^7502506645 is an apocalyptic number.

It is an amenable number.

7502506645 is a deficient number, since it is larger than the sum of its proper divisors (1500501335).

7502506645 is a wasteful number, since it uses less digits than its factorization.

7502506645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500501334.

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 7502506645 is about 86617.0112910853. The cubic root of 7502506645 is about 1957.6518670366.

The spelling of 7502506645 in words is "seven billion, five hundred two million, five hundred six thousand, six hundred forty-five".