61156507216 has 60 divisors (see below), whose sum is σ = 138015839412. Its totient is φ = 26175765504.

The previous prime is 61156507211. The next prime is 61156507253. The reversal of 61156507216 is 61270565116.

It can be written as a sum of positive squares in 2 ways, for example, as 1569744400 + 59586762816 = 39620^2 + 244104^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61156507211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555576 + ... + 656488.

Almost surely, 2^61156507216 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 61156507216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69007919706).

61156507216 is an abundant number, since it is smaller than the sum of its proper divisors (76859332196).

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

61156507216 is a wasteful number, since it uses less digits than its factorization.

61156507216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101708 (or 101695 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 61156507216 in words is "sixty-one billion, one hundred fifty-six million, five hundred seven thousand, two hundred sixteen".