61745730 has 16 divisors (see below), whose sum is σ = 148189824. Its totient is φ = 16465520.

The previous prime is 61745693. The next prime is 61745737. The reversal of 61745730 is 3754716.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61745691 and 61745700.

It is not an unprimeable number, because it can be changed into a prime (61745737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1029066 + ... + 1029125.

It is an arithmetic number, because the mean of its divisors is an integer number (9261864).

Almost surely, 2^61745730 is an apocalyptic number.

61745730 is an abundant number, since it is smaller than the sum of its proper divisors (86444094).

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

61745730 is a wasteful number, since it uses less digits than its factorization.

61745730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058201.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 61745730 is about 7857.8451244600. The cubic root of 61745730 is about 395.2473588186.

The spelling of 61745730 in words is "sixty-one million, seven hundred forty-five thousand, seven hundred thirty".