61249431328 has 24 divisors (see below), whose sum is σ = 120594554892. Its totient is φ = 30622242816.

The previous prime is 61249431307. The next prime is 61249431407. The reversal of 61249431328 is 82313494216.

It can be written as a sum of positive squares in 2 ways, for example, as 61200822544 + 48608784 = 247388^2 + 6972^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363976 + ... + 504952.

Almost surely, 2^61249431328 is an apocalyptic number.

It is an amenable number.

61249431328 is a deficient number, since it is larger than the sum of its proper divisors (59345123564).

61249431328 is a wasteful number, since it uses less digits than its factorization.

61249431328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154564 (or 154556 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The spelling of 61249431328 in words is "sixty-one billion, two hundred forty-nine million, four hundred thirty-one thousand, three hundred twenty-eight".