61138868152 has 8 divisors (see below), whose sum is σ = 114635377800. Its totient is φ = 30569434072.

The previous prime is 61138868069. The next prime is 61138868171. The reversal of 61138868152 is 25186883116.

61138868152 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×61138868152² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61138868096 and 61138868105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821179252 + ... + 3821179267.

It is an arithmetic number, because the mean of its divisors is an integer number (14329422225).

Almost surely, 2^61138868152 is an apocalyptic number.

It is an amenable number.

61138868152 is a deficient number, since it is larger than the sum of its proper divisors (53496509648).

61138868152 is a wasteful number, since it uses less digits than its factorization.

61138868152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642358525 (or 7642358521 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The spelling of 61138868152 in words is "sixty-one billion, one hundred thirty-eight million, eight hundred sixty-eight thousand, one hundred fifty-two".