61855677541 has 16 divisors (see below), whose sum is σ = 71856489600. Its totient is φ = 52151519808.

The previous prime is 61855677529. The next prime is 61855677613. The reversal of 61855677541 is 14577655816.

It is a cyclic number.

It is not a de Polignac number, because 61855677541 - 2⁷ = 61855677413 is a prime.

It is a super-2 number, since 2×61855677541² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61855677511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99406 + ... + 365503.

It is an arithmetic number, because the mean of its divisors is an integer number (4491030600).

Almost surely, 2^61855677541 is an apocalyptic number.

It is an amenable number.

61855677541 is a deficient number, since it is larger than the sum of its proper divisors (10000812059).

61855677541 is a wasteful number, since it uses less digits than its factorization.

61855677541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465228.

The product of its digits is 7056000, while the sum is 55.

The spelling of 61855677541 in words is "sixty-one billion, eight hundred fifty-five million, six hundred seventy-seven thousand, five hundred forty-one".