61478763 has 4 divisors (see below), whose sum is σ = 81971688. Its totient is φ = 40985840.

The previous prime is 61478761. The next prime is 61478771. The reversal of 61478763 is 36787416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61478763 - 2¹ = 61478761 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (61478761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10246458 + ... + 10246463.

It is an arithmetic number, because the mean of its divisors is an integer number (20492922).

Almost surely, 2^61478763 is an apocalyptic number.

61478763 is a deficient number, since it is larger than the sum of its proper divisors (20492925).

61478763 is a wasteful number, since it uses less digits than its factorization.

61478763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20492924.

The product of its digits is 169344, while the sum is 42.

The square root of 61478763 is about 7840.8394321016. The cubic root of 61478763 is about 394.6768986300.

It can be divided in two parts, 6 and 1478763, that multiplied together give a triangular number (8872578 = T₄₂₁₂).

The spelling of 61478763 in words is "sixty-one million, four hundred seventy-eight thousand, seven hundred sixty-three".