61840061290 has 32 divisors (see below), whose sum is σ = 127242460800. Its totient is φ = 21197536704.

The previous prime is 61840061267. The next prime is 61840061321. The reversal of 61840061290 is 9216004816.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221329 + ... + 415531.

It is an arithmetic number, because the mean of its divisors is an integer number (3976326900).

Almost surely, 2^61840061290 is an apocalyptic number.

61840061290 is an abundant number, since it is smaller than the sum of its proper divisors (65402399510).

61840061290 is a wasteful number, since it uses less digits than its factorization.

61840061290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198766.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 61840061290 in words is "sixty-one billion, eight hundred forty million, sixty-one thousand, two hundred ninety".