61853286651863 has 48 divisors (see below), whose sum is σ = 72736715415744. Its totient is φ = 52442082201600.

The previous prime is 61853286651859. The next prime is 61853286651901. The reversal of 61853286651863 is 36815668235816.

It is not a de Polignac number, because 61853286651863 - 2² = 61853286651859 is a prime.

It is a super-2 number, since 2×61853286651863² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61853286651793 and 61853286651802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61853286650863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2262607931 + ... + 2262635267.

It is an arithmetic number, because the mean of its divisors is an integer number (1515348237828).

Almost surely, 2^{61853286651863} is an apocalyptic number.

61853286651863 is a deficient number, since it is larger than the sum of its proper divisors (10883428763881).

61853286651863 is a wasteful number, since it uses less digits than its factorization.

61853286651863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28792 (or 28785 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 68.

The spelling of 61853286651863 in words is "sixty-one trillion, eight hundred fifty-three billion, two hundred eighty-six million, six hundred fifty-one thousand, eight hundred sixty-three".