61892188646437 has 2 divisors, whose sum is σ = 61892188646438. Its totient is φ = 61892188646436.

The previous prime is 61892188646389. The next prime is 61892188646489. The reversal of 61892188646437 is 73464688129816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55026709164001 + 6865479482436 = 7417999^2 + 2620206^2 .

It is a cyclic number.

It is not a de Polignac number, because 61892188646437 - 2¹⁵ = 61892188613669 is a prime.

It is a super-2 number, since 2×61892188646437² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61892188646437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61892188646837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30946094323218 + 30946094323219.

It is an arithmetic number, because the mean of its divisors is an integer number (30946094323219).

Almost surely, 2^{61892188646437} is an apocalyptic number.

It is an amenable number.

61892188646437 is a deficient number, since it is larger than the sum of its proper divisors (1).

61892188646437 is an equidigital number, since it uses as much as digits as its factorization.

61892188646437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 668860416, while the sum is 73.

The spelling of 61892188646437 in words is "sixty-one trillion, eight hundred ninety-two billion, one hundred eighty-eight million, six hundred forty-six thousand, four hundred thirty-seven".