61438669358 has 48 divisors (see below), whose sum is σ = 107703110592. Its totient is φ = 26174438400.

The previous prime is 61438669343. The next prime is 61438669373. The reversal of 61438669358 is 85396683416.

61438669358 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61438669343) and next prime (61438669373).

It is a junction number, because it is equal to n+sod(n) for n = 61438669297 and 61438669306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 960491 + ... + 1022457.

It is an arithmetic number, because the mean of its divisors is an integer number (2243814804).

Almost surely, 2^61438669358 is an apocalyptic number.

61438669358 is a deficient number, since it is larger than the sum of its proper divisors (46264441234).

61438669358 is a wasteful number, since it uses less digits than its factorization.

61438669358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62249 (or 62238 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 59.

The spelling of 61438669358 in words is "sixty-one billion, four hundred thirty-eight million, six hundred sixty-nine thousand, three hundred fifty-eight".