61213281142357 has 2 divisors, whose sum is σ = 61213281142358. Its totient is φ = 61213281142356.

The previous prime is 61213281142297. The next prime is 61213281142379. The reversal of 61213281142357 is 75324118231216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42648135546916 + 18565145595441 = 6530554^2 + 4308729^2 .

It is a cyclic number.

It is not a de Polignac number, because 61213281142357 - 2²³ = 61213272753749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61213281149357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30606640571178 + 30606640571179.

It is an arithmetic number, because the mean of its divisors is an integer number (30606640571179).

Almost surely, 2^{61213281142357} is an apocalyptic number.

It is an amenable number.

61213281142357 is a deficient number, since it is larger than the sum of its proper divisors (1).

61213281142357 is an equidigital number, since it uses as much as digits as its factorization.

61213281142357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The spelling of 61213281142357 in words is "sixty-one trillion, two hundred thirteen billion, two hundred eighty-one million, one hundred forty-two thousand, three hundred fifty-seven".