7315493861 has 8 divisors (see below), whose sum is σ = 8149887480. Its totient is φ = 6519909312.

The previous prime is 7315493821. The next prime is 7315493897. The reversal of 7315493861 is 1683945137.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 515017636 + 6800476225 = 22694^2 + 82465^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7315493861 - 2⁶ = 7315493797 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 (7315493821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9701870 + ... + 9702623.

It is an arithmetic number, because the mean of its divisors is an integer number (1018735935).

Almost surely, 2^7315493861 is an apocalyptic number.

It is an amenable number.

7315493861 is a deficient number, since it is larger than the sum of its proper divisors (834393619).

7315493861 is a wasteful number, since it uses less digits than its factorization.

7315493861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19404535.

The product of its digits is 544320, while the sum is 47.

The square root of 7315493861 is about 85530.6603563892. The cubic root of 7315493861 is about 1941.2488735682.

The spelling of 7315493861 in words is "seven billion, three hundred fifteen million, four hundred ninety-three thousand, eight hundred sixty-one".