61520408 has 8 divisors (see below), whose sum is σ = 115350780. Its totient is φ = 30760200.

The previous prime is 61520383. The next prime is 61520411. The reversal of 61520408 is 80402516.

61520408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3845018 + ... + 3845033.

Almost surely, 2^61520408 is an apocalyptic number.

It is an amenable number.

61520408 is a deficient number, since it is larger than the sum of its proper divisors (53830372).

61520408 is a wasteful number, since it uses less digits than its factorization.

61520408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7690057 (or 7690053 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 61520408 is about 7843.4946293091. The cubic root of 61520408 is about 394.7659950311.

The spelling of 61520408 in words is "sixty-one million, five hundred twenty thousand, four hundred eight".