61772445 has 48 divisors (see below), whose sum is σ = 125379072. Its totient is φ = 27544320.

The previous prime is 61772393. The next prime is 61772449. The reversal of 61772445 is 54427716.

It is not a de Polignac number, because 61772445 - 2¹² = 61768349 is a prime.

It is a super-2 number, since 2×61772445² = 7631669922556050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61772449) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10524 + ... + 15306.

It is an arithmetic number, because the mean of its divisors is an integer number (2612064).

Almost surely, 2^61772445 is an apocalyptic number.

It is an amenable number.

61772445 is an abundant number, since it is smaller than the sum of its proper divisors (63606627).

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

61772445 is a wasteful number, since it uses less digits than its factorization.

61772445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4842 (or 4839 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 61772445 is about 7859.5448341491. The cubic root of 61772445 is about 395.3043533709.

The spelling of 61772445 in words is "sixty-one million, seven hundred seventy-two thousand, four hundred forty-five".