61845454816 has 12 divisors (see below), whose sum is σ = 121758239232. Its totient is φ = 30922727392.

The previous prime is 61845454799. The next prime is 61845454817.

61845454816 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61845454817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 966335200 + ... + 966335263.

It is an arithmetic number, because the mean of its divisors is an integer number (10146519936).

Almost surely, 2^61845454816 is an apocalyptic number.

It is an amenable number.

61845454816 is a deficient number, since it is larger than the sum of its proper divisors (59912784416).

61845454816 is a wasteful number, since it uses less digits than its factorization.

61845454816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932670473 (or 1932670465 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 52.

The spelling of 61845454816 in words is "sixty-one billion, eight hundred forty-five million, four hundred fifty-four thousand, eight hundred sixteen".