61504204131919 has 2 divisors, whose sum is σ = 61504204131920. Its totient is φ = 61504204131918.

The previous prime is 61504204131893. The next prime is 61504204131991. The reversal of 61504204131919 is 91913140240516.

Together with next prime (61504204131991) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61504204131919 - 2³⁷ = 61366765178447 is a prime.

It is a super-2 number, since 2×61504204131919² (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 (61504204101919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30752102065959 + 30752102065960.

It is an arithmetic number, because the mean of its divisors is an integer number (30752102065960).

Almost surely, 2^{61504204131919} is an apocalyptic number.

61504204131919 is a deficient number, since it is larger than the sum of its proper divisors (1).

61504204131919 is an equidigital number, since it uses as much as digits as its factorization.

61504204131919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 61504204131919 in words is "sixty-one trillion, five hundred four billion, two hundred four million, one hundred thirty-one thousand, nine hundred nineteen".