61894282913 has 4 divisors (see below), whose sum is σ = 61937779968. Its totient is φ = 61850785860.

The previous prime is 61894282843. The next prime is 61894282949. The reversal of 61894282913 is 31928249816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61894282913 - 2¹⁶ = 61894217377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61894282973) 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, 21746393 + ... + 21749238.

It is an arithmetic number, because the mean of its divisors is an integer number (15484444992).

Almost surely, 2^61894282913 is an apocalyptic number.

It is an amenable number.

61894282913 is a deficient number, since it is larger than the sum of its proper divisors (43497055).

61894282913 is a wasteful number, since it uses less digits than its factorization.

61894282913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43497054.

The product of its digits is 1492992, while the sum is 53.

The spelling of 61894282913 in words is "sixty-one billion, eight hundred ninety-four million, two hundred eighty-two thousand, nine hundred thirteen".