61619490048 has 72 divisors (see below), whose sum is σ = 164327380000. Its totient is φ = 20498540544.

The previous prime is 61619490041. The next prime is 61619490067. The reversal of 61619490048 is 84009491616.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 61619489979 and 61619490006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61619490041) 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, 302838 + ... + 463626.

Almost surely, 2^61619490048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61619490048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82163690000).

61619490048 is an abundant number, since it is smaller than the sum of its proper divisors (102707889952).

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

61619490048 is a wasteful number, since it uses less digits than its factorization.

61619490048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161307 (or 161293 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 61619490048 in words is "sixty-one billion, six hundred nineteen million, four hundred ninety thousand, forty-eight".