61720374 has 16 divisors (see below), whose sum is σ = 124534512. Its totient is φ = 20391168.

The previous prime is 61720369. The next prime is 61720397. The reversal of 61720374 is 47302716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44839 + ... + 46194.

It is an arithmetic number, because the mean of its divisors is an integer number (7783407).

Almost surely, 2^61720374 is an apocalyptic number.

61720374 is an abundant number, since it is smaller than the sum of its proper divisors (62814138).

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

61720374 is a wasteful number, since it uses less digits than its factorization.

61720374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91151.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 61720374 is about 7856.2315393578. The cubic root of 61720374 is about 395.1932483876.

The spelling of 61720374 in words is "sixty-one million, seven hundred twenty thousand, three hundred seventy-four".