61520016 has 20 divisors (see below), whose sum is σ = 158926832. Its totient is φ = 20506656.

The previous prime is 61519999. The next prime is 61520029. The reversal of 61520016 is 61002516.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61519974 and 61520001.

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, 640786 + ... + 640881.

Almost surely, 2^61520016 is an apocalyptic number.

It is an amenable number.

61520016 is an abundant number, since it is smaller than the sum of its proper divisors (97406816).

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

61520016 is a wasteful number, since it uses less digits than its factorization.

61520016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281678 (or 1281672 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 61520016 is about 7843.4696404079. The cubic root of 61520016 is about 394.7651565636.

The spelling of 61520016 in words is "sixty-one million, five hundred twenty thousand, sixteen".