61963557376 has 160 divisors (see below), whose sum is σ = 148495995648. Its totient is φ = 25254789120.

The previous prime is 61963557373. The next prime is 61963557379. The reversal of 61963557376 is 67375536916.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61963557373) and next prime (61963557379).

It is a self number, because there is not a number n which added to its sum of digits gives 61963557376.

It is not an unprimeable number, because it can be changed into a prime (61963557371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14918116 + ... + 14922268.

Almost surely, 2^61963557376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61963557376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74247997824).

61963557376 is an abundant number, since it is smaller than the sum of its proper divisors (86532438272).

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

61963557376 is a wasteful number, since it uses less digits than its factorization.

61963557376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382 (or 4366 counting only the distinct ones).

The product of its digits is 21432600, while the sum is 58.

The spelling of 61963557376 in words is "sixty-one billion, nine hundred sixty-three million, five hundred fifty-seven thousand, three hundred seventy-six".