61146445 has 4 divisors (see below), whose sum is σ = 73375740. Its totient is φ = 48917152.

The previous prime is 61146439. The next prime is 61146451. The reversal of 61146445 is 54464116.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61146439) and next prime (61146451).

It can be written as a sum of positive squares in 2 ways, for example, as 43007364 + 18139081 = 6558^2 + 4259^2 .

It is a cyclic number.

It is not a de Polignac number, because 61146445 - 2⁷ = 61146317 is a prime.

It is a super-2 number, since 2×61146445² = 7477775472276050, which contains 22 as substring.

It is a congruent number.

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, 6114640 + ... + 6114649.

It is an arithmetic number, because the mean of its divisors is an integer number (18343935).

Almost surely, 2^61146445 is an apocalyptic number.

It is an amenable number.

61146445 is a deficient number, since it is larger than the sum of its proper divisors (12229295).

61146445 is a wasteful number, since it uses less digits than its factorization.

61146445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12229294.

The product of its digits is 11520, while the sum is 31.

The square root of 61146445 is about 7819.6192362544. The cubic root of 61146445 is about 393.9644831289.

The spelling of 61146445 in words is "sixty-one million, one hundred forty-six thousand, four hundred forty-five".