61897527078 has 16 divisors (see below), whose sum is σ = 124350191616. Its totient is φ = 20539986120.

The previous prime is 61897527071. The next prime is 61897527101. The reversal of 61897527078 is 87072579816.

61897527078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61897527071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23129278 + ... + 23131953.

It is an arithmetic number, because the mean of its divisors is an integer number (7771886976).

Almost surely, 2^61897527078 is an apocalyptic number.

61897527078 is an abundant number, since it is smaller than the sum of its proper divisors (62452664538).

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

61897527078 is a wasteful number, since it uses less digits than its factorization.

61897527078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46261459.

The product of its (nonzero) digits is 11854080, while the sum is 60.

The spelling of 61897527078 in words is "sixty-one billion, eight hundred ninety-seven million, five hundred twenty-seven thousand, seventy-eight".