61130291890 has 16 divisors (see below), whose sum is σ = 110060608320. Its totient is φ = 24446320560.

The previous prime is 61130291879. The next prime is 61130291899. The reversal of 61130291890 is 9819203116.

It is not an unprimeable number, because it can be changed into a prime (61130291899) 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, 680100 + ... + 764719.

It is an arithmetic number, because the mean of its divisors is an integer number (6878788020).

Almost surely, 2^61130291890 is an apocalyptic number.

61130291890 is a deficient number, since it is larger than the sum of its proper divisors (48930316430).

61130291890 is a wasteful number, since it uses less digits than its factorization.

61130291890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449057.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 61130291890 in words is "sixty-one billion, one hundred thirty million, two hundred ninety-one thousand, eight hundred ninety".