61557496 has 64 divisors (see below), whose sum is σ = 154990080. Its totient is φ = 22135680.

The previous prime is 61557487. The next prime is 61557533. The reversal of 61557496 is 69475516.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4165 + ... + 11851.

It is an arithmetic number, because the mean of its divisors is an integer number (2421720).

Almost surely, 2^61557496 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 61557496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77495040).

61557496 is an abundant number, since it is smaller than the sum of its proper divisors (93432584).

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

61557496 is a wasteful number, since it uses less digits than its factorization.

61557496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7724 (or 7720 counting only the distinct ones).

The product of its digits is 226800, while the sum is 43.

The square root of 61557496 is about 7845.8585253623. The cubic root of 61557496 is about 394.8453082245.

The spelling of 61557496 in words is "sixty-one million, five hundred fifty-seven thousand, four hundred ninety-six".