61811379 has 12 divisors (see below), whose sum is σ = 102037936. Its totient is φ = 35320752.

The previous prime is 61811377. The next prime is 61811381. The reversal of 61811379 is 97311816.

61811379 is a `hidden beast` number, since 618 + 1 + 1 + 37 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (61811377) and next prime (61811381).

It is not a de Polignac number, because 61811379 - 2¹ = 61811377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61811377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490504 + ... + 490629.

Almost surely, 2^61811379 is an apocalyptic number.

61811379 is a deficient number, since it is larger than the sum of its proper divisors (40226557).

61811379 is a wasteful number, since it uses less digits than its factorization.

61811379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981146 (or 981143 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 61811379 is about 7862.0213049826. The cubic root of 61811379 is about 395.3873868730.

The spelling of 61811379 in words is "sixty-one million, eight hundred eleven thousand, three hundred seventy-nine".