61819548 has 48 divisors (see below), whose sum is σ = 174553344. Its totient is φ = 16623360.

The previous prime is 61819547. The next prime is 61819553. The reversal of 61819548 is 84591816.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61819547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20218 + ... + 23073.

It is an arithmetic number, because the mean of its divisors is an integer number (3636528).

Almost surely, 2^61819548 is an apocalyptic number.

61819548 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

61819548 is an abundant number, since it is smaller than the sum of its proper divisors (112733796).

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

61819548 is a wasteful number, since it uses less digits than its factorization.

61819548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43322 (or 43320 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 61819548 is about 7862.5408107049. The cubic root of 61819548 is about 395.4048042555.

The spelling of 61819548 in words is "sixty-one million, eight hundred nineteen thousand, five hundred forty-eight".