61640124 has 96 divisors (see below), whose sum is σ = 180934656. Its totient is φ = 15897600.

The previous prime is 61640119. The next prime is 61640129. The reversal of 61640124 is 42104616.

It is an interprime number because it is at equal distance from previous prime (61640119) and next prime (61640129).

It is a junction number, because it is equal to n+sod(n) for n = 61640094 and 61640103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61640129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50724 + ... + 51924.

It is an arithmetic number, because the mean of its divisors is an integer number (1884736).

Almost surely, 2^61640124 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 61640124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90467328).

61640124 is an abundant number, since it is smaller than the sum of its proper divisors (119294532).

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

61640124 is a wasteful number, since it uses less digits than its factorization.

61640124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275 (or 1273 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 61640124 is about 7851.1224675202. The cubic root of 61640124 is about 395.0218948500.

The spelling of 61640124 in words is "sixty-one million, six hundred forty thousand, one hundred twenty-four".