61153878 has 16 divisors (see below), whose sum is σ = 125291376. Its totient is φ = 19887360.

The previous prime is 61153877. The next prime is 61153901. The reversal of 61153878 is 87835116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61153877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124051 + ... + 124542.

It is an arithmetic number, because the mean of its divisors is an integer number (7830711).

Almost surely, 2^61153878 is an apocalyptic number.

61153878 is an abundant number, since it is smaller than the sum of its proper divisors (64137498).

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

61153878 is a wasteful number, since it uses less digits than its factorization.

61153878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248639.

The product of its digits is 40320, while the sum is 39.

The square root of 61153878 is about 7820.0945007078. The cubic root of 61153878 is about 393.9804460049.

The spelling of 61153878 in words is "sixty-one million, one hundred fifty-three thousand, eight hundred seventy-eight".