61494874890623 has 4 divisors (see below), whose sum is σ = 63478580532288. Its totient is φ = 59511169248960.

The previous prime is 61494874890619. The next prime is 61494874890637. The reversal of 61494874890623 is 32609847849416.

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

It is a cyclic number.

It is not a de Polignac number, because 61494874890623 - 2² = 61494874890619 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 (61494874890613) 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, 991852820786 + ... + 991852820847.

It is an arithmetic number, because the mean of its divisors is an integer number (15869645133072).

Almost surely, 2^{61494874890623} is an apocalyptic number.

61494874890623 is a deficient number, since it is larger than the sum of its proper divisors (1983705641665).

61494874890623 is a wasteful number, since it uses less digits than its factorization.

61494874890623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983705641664.

The product of its (nonzero) digits is 501645312, while the sum is 71.

The spelling of 61494874890623 in words is "sixty-one trillion, four hundred ninety-four billion, eight hundred seventy-four million, eight hundred ninety thousand, six hundred twenty-three".