61290163538 has 8 divisors (see below), whose sum is σ = 91957951920. Its totient is φ = 30637512900.

The previous prime is 61290163531. The next prime is 61290163589. The reversal of 61290163538 is 83536109216.

61290163538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61290163531) 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, 3774308 + ... + 3790511.

It is an arithmetic number, because the mean of its divisors is an integer number (11494743990).

Almost surely, 2^61290163538 is an apocalyptic number.

61290163538 is a deficient number, since it is larger than the sum of its proper divisors (30667788382).

61290163538 is a wasteful number, since it uses less digits than its factorization.

61290163538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568872.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 61290163538 in words is "sixty-one billion, two hundred ninety million, one hundred sixty-three thousand, five hundred thirty-eight".