61820658057393 has 6 divisors (see below), whose sum is σ = 89296506082914. Its totient is φ = 41213772038256.

The previous prime is 61820658057373. The next prime is 61820658057421. The reversal of 61820658057393 is 39375085602816.

61820658057393 is a `hidden beast` number, since 6 + 1 + 8 + 2 + 0 + 6 + 58 + 0 + 573 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 47824320053169 + 13996338004224 = 6915513^2 + 3741168^2 .

It is not a de Polignac number, because 61820658057393 - 2⁶ = 61820658057329 is a prime.

It is a super-2 number, since 2×61820658057393² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61820658057393.

It is not an unprimeable number, because it can be changed into a prime (61820658057343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3434481003180 + ... + 3434481003197.

It is an arithmetic number, because the mean of its divisors is an integer number (14882751013819).

Almost surely, 2^{61820658057393} is an apocalyptic number.

It is an amenable number.

61820658057393 is a deficient number, since it is larger than the sum of its proper divisors (27475848025521).

61820658057393 is a wasteful number, since it uses less digits than its factorization.

61820658057393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6868962006383 (or 6868962006380 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 61820658057393 in words is "sixty-one trillion, eight hundred twenty billion, six hundred fifty-eight million, fifty-seven thousand, three hundred ninety-three".