61861450 has 24 divisors (see below), whose sum is σ = 131500512. Its totient is φ = 21209520.

The previous prime is 61861433. The next prime is 61861463. The reversal of 61861450 is 5416816.

It is a super-2 number, since 2×61861450² = 7653677992205000, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 88024 + ... + 88723.

It is an arithmetic number, because the mean of its divisors is an integer number (5479188).

Almost surely, 2^61861450 is an apocalyptic number.

61861450 is an abundant number, since it is smaller than the sum of its proper divisors (69639062).

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

61861450 is a wasteful number, since it uses less digits than its factorization.

61861450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176766 (or 176761 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 61861450 is about 7865.2050195783. The cubic root of 61861450 is about 395.4941207186.

The spelling of 61861450 in words is "sixty-one million, eight hundred sixty-one thousand, four hundred fifty".