61850072238 has 64 divisors (see below), whose sum is σ = 129609704448. Its totient is φ = 19657693440.

The previous prime is 61850072233. The next prime is 61850072257. The reversal of 61850072238 is 83227005816.

It is a self number, because there is not a number n which added to its sum of digits gives 61850072238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61850072233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2620506 + ... + 2644002.

It is an arithmetic number, because the mean of its divisors is an integer number (2025151632).

Almost surely, 2^61850072238 is an apocalyptic number.

61850072238 is an abundant number, since it is smaller than the sum of its proper divisors (67759632210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61850072238 is a wasteful number, since it uses less digits than its factorization.

61850072238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23777.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 61850072238 in words is "sixty-one billion, eight hundred fifty million, seventy-two thousand, two hundred thirty-eight".