61909496 has 32 divisors (see below), whose sum is σ = 127468080. Its totient is φ = 27955200.

The previous prime is 61909469. The next prime is 61909499. The reversal of 61909496 is 69490916.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61909499) 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, 11576 + ... + 16056.

Almost surely, 2^61909496 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 61909496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63734040).

61909496 is an abundant number, since it is smaller than the sum of its proper divisors (65558584).

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

61909496 is a wasteful number, since it uses less digits than its factorization.

61909496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4655 (or 4651 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 61909496 is about 7868.2587654449. The cubic root of 61909496 is about 395.5964838394.

The spelling of 61909496 in words is "sixty-one million, nine hundred nine thousand, four hundred ninety-six".