61478277 has 8 divisors (see below), whose sum is σ = 93681216. Its totient is φ = 35130432.

The previous prime is 61478257. The next prime is 61478299. The reversal of 61478277 is 77287416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61478277 - 2¹⁹ = 60953989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61478227) 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, 1463748 + ... + 1463789.

It is an arithmetic number, because the mean of its divisors is an integer number (11710152).

Almost surely, 2^61478277 is an apocalyptic number.

It is an amenable number.

61478277 is a deficient number, since it is larger than the sum of its proper divisors (32202939).

61478277 is a wasteful number, since it uses less digits than its factorization.

61478277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927547.

The product of its digits is 131712, while the sum is 42.

The square root of 61478277 is about 7840.8084404607. The cubic root of 61478277 is about 394.6758586315.

The spelling of 61478277 in words is "sixty-one million, four hundred seventy-eight thousand, two hundred seventy-seven".