61917048 has 160 divisors (see below), whose sum is σ = 188179200. Its totient is φ = 18957888.

The previous prime is 61917047. The next prime is 61917049. The reversal of 61917048 is 84071916.

It is an interprime number because it is at equal distance from previous prime (61917047) and next prime (61917049).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61917047) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 578611 + ... + 578717.

It is an arithmetic number, because the mean of its divisors is an integer number (1176120).

Almost surely, 2^61917048 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 61917048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94089600).

61917048 is an abundant number, since it is smaller than the sum of its proper divisors (126262152).

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

61917048 is a wasteful number, since it uses less digits than its factorization.

61917048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 61917048 is about 7868.7386536852. The cubic root of 61917048 is about 395.6125687341.

The spelling of 61917048 in words is "sixty-one million, nine hundred seventeen thousand, forty-eight".