61375920 has 40 divisors (see below), whose sum is σ = 190266096. Its totient is φ = 16366848.

The previous prime is 61375907. The next prime is 61375973. The reversal of 61375920 is 2957316.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127627 + ... + 128106.

Almost surely, 2^61375920 is an apocalyptic number.

61375920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61375920 is an abundant number, since it is smaller than the sum of its proper divisors (128890176).

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

61375920 is a wasteful number, since it uses less digits than its factorization.

61375920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255749 (or 255743 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 61375920 is about 7834.2785245356. The cubic root of 61375920 is about 394.4567011260.

The spelling of 61375920 in words is "sixty-one million, three hundred seventy-five thousand, nine hundred twenty".