61530036071389 has 2 divisors, whose sum is σ = 61530036071390. Its totient is φ = 61530036071388.

The previous prime is 61530036071327. The next prime is 61530036071443. The reversal of 61530036071389 is 98317063003516.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53921734432164 + 7608301639225 = 7343142^2 + 2758315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61530036071389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61530037071389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30765018035694 + 30765018035695.

It is an arithmetic number, because the mean of its divisors is an integer number (30765018035695).

Almost surely, 2^{61530036071389} is an apocalyptic number.

It is an amenable number.

61530036071389 is a deficient number, since it is larger than the sum of its proper divisors (1).

61530036071389 is an equidigital number, since it uses as much as digits as its factorization.

61530036071389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 61530036071389 in words is "sixty-one trillion, five hundred thirty billion, thirty-six million, seventy-one thousand, three hundred eighty-nine".