2615654623 has 4 divisors (see below), whose sum is σ = 2705849640. Its totient is φ = 2525459608.

The previous prime is 2615654617. The next prime is 2615654633. The reversal of 2615654623 is 3264565162.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3264565162 = 2 ⋅1632282581.

It is a cyclic number.

It is not a de Polignac number, because 2615654623 - 2¹⁷ = 2615523551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2615654603) 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, 45097465 + ... + 45097522.

It is an arithmetic number, because the mean of its divisors is an integer number (676462410).

Almost surely, 2^2615654623 is an apocalyptic number.

2615654623 is a deficient number, since it is larger than the sum of its proper divisors (90195017).

2615654623 is an equidigital number, since it uses as much as digits as its factorization.

2615654623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90195016.

The product of its digits is 259200, while the sum is 40.

The square root of 2615654623 is about 51143.4709713762. The cubic root of 2615654623 is about 1377.8231139375.

It can be divided in two parts, 261 and 5654623, that added together give a square (5654884 = 2378²).

The spelling of 2615654623 in words is "two billion, six hundred fifteen million, six hundred fifty-four thousand, six hundred twenty-three".