61421663248 has 20 divisors (see below), whose sum is σ = 129823061328. Its totient is φ = 27918937760.

The previous prime is 61421663213. The next prime is 61421663257. The reversal of 61421663248 is 84236612416.

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, 174493186 + ... + 174493537.

Almost surely, 2^61421663248 is an apocalyptic number.

It is an amenable number.

61421663248 is an abundant number, since it is smaller than the sum of its proper divisors (68401398080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61421663248 is a wasteful number, since it uses less digits than its factorization.

61421663248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348986742 (or 348986736 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The spelling of 61421663248 in words is "sixty-one billion, four hundred twenty-one million, six hundred sixty-three thousand, two hundred forty-eight".