61207688544 has 96 divisors (see below), whose sum is σ = 164802405600. Its totient is φ = 19883016192.

The previous prime is 61207688519. The next prime is 61207688569. The reversal of 61207688544 is 44588670216.

It is an interprime number because it is at equal distance from previous prime (61207688519) and next prime (61207688569).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×61207688544² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717744 + ... + 798480.

It is an arithmetic number, because the mean of its divisors is an integer number (1716691725).

Almost surely, 2^61207688544 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 61207688544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82401202800).

61207688544 is an abundant number, since it is smaller than the sum of its proper divisors (103594717056).

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

61207688544 is a wasteful number, since it uses less digits than its factorization.

61207688544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80952 (or 80944 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 61207688544 in words is "sixty-one billion, two hundred seven million, six hundred eighty-eight thousand, five hundred forty-four".