61720461 has 40 divisors (see below), whose sum is σ = 102557664. Its totient is φ = 36672480.

The previous prime is 61720459. The next prime is 61720501. The reversal of 61720461 is 16402716.

61720461 is a `hidden beast` number, since 617 + 2 + 0 + 46 + 1 = 666.

It is not a de Polignac number, because 61720461 - 2¹ = 61720459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61720861) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46570 + ... + 47876.

Almost surely, 2^61720461 is an apocalyptic number.

It is an amenable number.

61720461 is a deficient number, since it is larger than the sum of its proper divisors (40837203).

61720461 is a wasteful number, since it uses less digits than its factorization.

61720461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1374 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 61720461 is about 7856.2370763617. The cubic root of 61720461 is about 395.1934340734.

The spelling of 61720461 in words is "sixty-one million, seven hundred twenty thousand, four hundred sixty-one".