61819152 has 20 divisors (see below), whose sum is σ = 159699600. Its totient is φ = 20606368.

The previous prime is 61819139. The next prime is 61819181. The reversal of 61819152 is 25191816.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643902 + ... + 643997.

It is an arithmetic number, because the mean of its divisors is an integer number (7984980).

Almost surely, 2^61819152 is an apocalyptic number.

It is an amenable number.

61819152 is an abundant number, since it is smaller than the sum of its proper divisors (97880448).

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

61819152 is a wasteful number, since it uses less digits than its factorization.

61819152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287910 (or 1287904 counting only the distinct ones).

The product of its digits is 4320, while the sum is 33.

The square root of 61819152 is about 7862.5156279654. The cubic root of 61819152 is about 395.4039599668.

The spelling of 61819152 in words is "sixty-one million, eight hundred nineteen thousand, one hundred fifty-two".