61037321887 has 2 divisors, whose sum is σ = 61037321888. Its totient is φ = 61037321886.

The previous prime is 61037321867. The next prime is 61037321893. The reversal of 61037321887 is 78812373016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61037321887 - 2⁷ = 61037321759 is a prime.

It is a super-3 number, since 3×61037321887³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61037321827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30518660943 + 30518660944.

It is an arithmetic number, because the mean of its divisors is an integer number (30518660944).

Almost surely, 2^61037321887 is an apocalyptic number.

61037321887 is a deficient number, since it is larger than the sum of its proper divisors (1).

61037321887 is an equidigital number, since it uses as much as digits as its factorization.

61037321887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 61037321887 in words is "sixty-one billion, thirty-seven million, three hundred twenty-one thousand, eight hundred eighty-seven".