7453215506861 has 4 divisors (see below), whose sum is σ = 7454919882492. Its totient is φ = 7451511131232.

The previous prime is 7453215506813. The next prime is 7453215506923. The reversal of 7453215506861 is 1686055123547.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6545589649225 + 907625857636 = 2558435^2 + 952694^2 .

It is a cyclic number.

It is not a de Polignac number, because 7453215506861 - 2⁶ = 7453215506797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7453215506161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852181256 + ... + 852190001.

It is an arithmetic number, because the mean of its divisors is an integer number (1863729970623).

Almost surely, 2^{7453215506861} is an apocalyptic number.

It is an amenable number.

7453215506861 is a deficient number, since it is larger than the sum of its proper divisors (1704375631).

7453215506861 is a wasteful number, since it uses less digits than its factorization.

7453215506861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704375630.

The product of its (nonzero) digits is 6048000, while the sum is 53.

The spelling of 7453215506861 in words is "seven trillion, four hundred fifty-three billion, two hundred fifteen million, five hundred six thousand, eight hundred sixty-one".