61620471 has 24 divisors (see below), whose sum is σ = 98057856. Its totient is φ = 36977040.

The previous prime is 61620469. The next prime is 61620497. The reversal of 61620471 is 17402616.

61620471 is a `hidden beast` number, since 616 + 2 + 0 + 47 + 1 = 666.

It is not a de Polignac number, because 61620471 - 2¹ = 61620469 is a prime.

It is a super-3 number, since 3×61620471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7176 + ... + 13218.

It is an arithmetic number, because the mean of its divisors is an integer number (4085744).

Almost surely, 2^61620471 is an apocalyptic number.

61620471 is a deficient number, since it is larger than the sum of its proper divisors (36437385).

61620471 is a wasteful number, since it uses less digits than its factorization.

61620471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6163 (or 6160 counting only the distinct ones).

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

The square root of 61620471 is about 7849.8707632674. The cubic root of 61620471 is about 394.9799081806.

The spelling of 61620471 in words is "sixty-one million, six hundred twenty thousand, four hundred seventy-one".