61529970 has 32 divisors (see below), whose sum is σ = 156359808. Its totient is φ = 15442688.

The previous prime is 61529957. The next prime is 61529977. The reversal of 61529970 is 7992516.

It is not an unprimeable number, because it can be changed into a prime (61529977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59814 + ... + 60833.

It is an arithmetic number, because the mean of its divisors is an integer number (4886244).

Almost surely, 2^61529970 is an apocalyptic number.

61529970 is an abundant number, since it is smaller than the sum of its proper divisors (94829838).

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

61529970 is a wasteful number, since it uses less digits than its factorization.

61529970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120674.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 61529970 is about 7844.1041553513. The cubic root of 61529970 is about 394.7864465475.

The spelling of 61529970 in words is "sixty-one million, five hundred twenty-nine thousand, nine hundred seventy".