61140398290 has 16 divisors (see below), whose sum is σ = 110084613912. Its totient is φ = 24449071104.

The previous prime is 61140398279. The next prime is 61140398351. The reversal of 61140398290 is 9289304116.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27654692209 + 33485706081 = 166297^2 + 182991^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849729 + ... + 918868.

Almost surely, 2^61140398290 is an apocalyptic number.

61140398290 is a deficient number, since it is larger than the sum of its proper divisors (48944215622).

61140398290 is a wasteful number, since it uses less digits than its factorization.

61140398290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772061.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 61140398290 in words is "sixty-one billion, one hundred forty million, three hundred ninety-eight thousand, two hundred ninety".