61546420 has 72 divisors (see below), whose sum is σ = 142037280. Its totient is φ = 22389120.

The previous prime is 61546399. The next prime is 61546423. The reversal of 61546420 is 2464516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61546423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 442711 + ... + 442849.

It is an arithmetic number, because the mean of its divisors is an integer number (1972740).

Almost surely, 2^61546420 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 61546420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71018640).

61546420 is an abundant number, since it is smaller than the sum of its proper divisors (80490860).

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

61546420 is a wasteful number, since it uses less digits than its factorization.

61546420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61546420 is about 7845.1526435118. The cubic root of 61546420 is about 394.8216253847.

The spelling of 61546420 in words is "sixty-one million, five hundred forty-six thousand, four hundred twenty".