61961253617382 has 64 divisors (see below), whose sum is σ = 142018471977984. Its totient is φ = 17654176805760.

The previous prime is 61961253617371. The next prime is 61961253617411. The reversal of 61961253617382 is 28371635216916.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25829532 + ... + 28126272.

It is an arithmetic number, because the mean of its divisors is an integer number (2219038624656).

Almost surely, 2^{61961253617382} is an apocalyptic number.

61961253617382 is an abundant number, since it is smaller than the sum of its proper divisors (80057218360602).

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

61961253617382 is a wasteful number, since it uses less digits than its factorization.

61961253617382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298533.

The product of its digits is 19595520, while the sum is 60.

The spelling of 61961253617382 in words is "sixty-one trillion, nine hundred sixty-one billion, two hundred fifty-three million, six hundred seventeen thousand, three hundred eighty-two".