61874180690389 has 2 divisors, whose sum is σ = 61874180690390. Its totient is φ = 61874180690388.

The previous prime is 61874180690369. The next prime is 61874180690437. The reversal of 61874180690389 is 98309608147816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55258780640625 + 6615400049764 = 7433625^2 + 2572042^2 .

It is a cyclic number.

It is not a de Polignac number, because 61874180690389 - 2¹⁵ = 61874180657621 is a prime.

It is a super-2 number, since 2×61874180690389² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61874180690369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30937090345194 + 30937090345195.

It is an arithmetic number, because the mean of its divisors is an integer number (30937090345195).

Almost surely, 2^{61874180690389} is an apocalyptic number.

It is an amenable number.

61874180690389 is a deficient number, since it is larger than the sum of its proper divisors (1).

61874180690389 is an equidigital number, since it uses as much as digits as its factorization.

61874180690389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125411328, while the sum is 70.

The spelling of 61874180690389 in words is "sixty-one trillion, eight hundred seventy-four billion, one hundred eighty million, six hundred ninety thousand, three hundred eighty-nine".