61835172402 has 64 divisors (see below), whose sum is σ = 134443929600. Its totient is φ = 18896549760.

The previous prime is 61835172401. The next prime is 61835172409. The reversal of 61835172402 is 20427153816.

It is not an unprimeable number, because it can be changed into a prime (61835172401) 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, 412027 + ... + 541697.

It is an arithmetic number, because the mean of its divisors is an integer number (2100686400).

Almost surely, 2^61835172402 is an apocalyptic number.

61835172402 is an abundant number, since it is smaller than the sum of its proper divisors (72608757198).

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

61835172402 is a wasteful number, since it uses less digits than its factorization.

61835172402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129831.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 61835172402 in words is "sixty-one billion, eight hundred thirty-five million, one hundred seventy-two thousand, four hundred two".