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61377613 = 1123116363
BaseRepresentation
bin1110101000100…
…0110001001101
311021111022020221
43222020301031
5111203040423
610031311341
71343462323
oct352106115
9137438227
1061377613
1131711a00
121867b551
13c94001b
148219d13
1555c5e5d
hex3a88c4d

61377613 has 12 divisors (see below), whose sum is σ = 69645184. Its totient is φ = 53994600.

The previous prime is 61377611. The next prime is 61377637. The reversal of 61377613 is 31677316.

It is a happy number.

It is not a de Polignac number, because 61377613 - 21 = 61377611 is a prime.

It is a super-2 number, since 2×613776132 = 7534422755155538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61377611) 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, 4431 + ... + 11932.

Almost surely, 261377613 is an apocalyptic number.

It is an amenable number.

61377613 is a deficient number, since it is larger than the sum of its proper divisors (8267571).

61377613 is a wasteful number, since it uses less digits than its factorization.

61377613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16416 (or 16405 counting only the distinct ones).

The product of its digits is 15876, while the sum is 34.

The square root of 61377613 is about 7834.3865745826. The cubic root of 61377613 is about 394.4603280048.

The spelling of 61377613 in words is "sixty-one million, three hundred seventy-seven thousand, six hundred thirteen".

Divisors: 1 11 31 121 341 3751 16363 179993 507253 1979923 5579783 61377613