61919608352 has 24 divisors (see below), whose sum is σ = 139319119296. Its totient is φ = 26536974912.

The previous prime is 61919608343. The next prime is 61919608357. The reversal of 61919608352 is 25380691916.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61919608352.

It is not an unprimeable number, because it can be changed into a prime (61919608357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138213188 + ... + 138213635.

It is an arithmetic number, because the mean of its divisors is an integer number (5804963304).

Almost surely, 2^61919608352 is an apocalyptic number.

It is an amenable number.

61919608352 is an abundant number, since it is smaller than the sum of its proper divisors (77399510944).

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

61919608352 is a wasteful number, since it uses less digits than its factorization.

61919608352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276426840 (or 276426832 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 61919608352 in words is "sixty-one billion, nine hundred nineteen million, six hundred eight thousand, three hundred fifty-two".