61764578203 has 4 divisors (see below), whose sum is σ = 61765572808. Its totient is φ = 61763583600.

The previous prime is 61764578201. The next prime is 61764578251. The reversal of 61764578203 is 30287546716.

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 61764578203 - 2¹ = 61764578201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61764578201) 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, 397473 + ... + 530578.

It is an arithmetic number, because the mean of its divisors is an integer number (15441393202).

Almost surely, 2^61764578203 is an apocalyptic number.

61764578203 is a deficient number, since it is larger than the sum of its proper divisors (994605).

61764578203 is an equidigital number, since it uses as much as digits as its factorization.

61764578203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994604.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 61764578203 in words is "sixty-one billion, seven hundred sixty-four million, five hundred seventy-eight thousand, two hundred three".