61497026412 has 12 divisors (see below), whose sum is σ = 143493061656. Its totient is φ = 20499008800.

The previous prime is 61497026401. The next prime is 61497026413. The reversal of 61497026412 is 21462079416.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (61497026413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2562376089 + ... + 2562376112.

It is an arithmetic number, because the mean of its divisors is an integer number (11957755138).

Almost surely, 2^61497026412 is an apocalyptic number.

It is an amenable number.

61497026412 is an abundant number, since it is smaller than the sum of its proper divisors (81996035244).

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

61497026412 is a wasteful number, since it uses less digits than its factorization.

61497026412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124752208 (or 5124752206 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 61497026412 in words is "sixty-one billion, four hundred ninety-seven million, twenty-six thousand, four hundred twelve".