61898241254139 has 16 divisors (see below), whose sum is σ = 93255354057600. Its totient is φ = 40566079012968.

The previous prime is 61898241254107. The next prime is 61898241254153. The reversal of 61898241254139 is 93145214289816.

61898241254139 is a `hidden beast` number, since 6 + 1 + 8 + 9 + 8 + 241 + 254 + 139 = 666.

It is not a de Polignac number, because 61898241254139 - 2⁵ = 61898241254107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61898241254189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19428197169 + ... + 19428200354.

It is an arithmetic number, because the mean of its divisors is an integer number (5828459628600).

Almost surely, 2^{61898241254139} is an apocalyptic number.

61898241254139 is a deficient number, since it is larger than the sum of its proper divisors (31357112803461).

61898241254139 is a wasteful number, since it uses less digits than its factorization.

61898241254139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38856397591 (or 38856397585 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 61898241254139 in words is "sixty-one trillion, eight hundred ninety-eight billion, two hundred forty-one million, two hundred fifty-four thousand, one hundred thirty-nine".