61895697477 has 16 divisors (see below), whose sum is σ = 88612900992. Its totient is φ = 38289520640.

The previous prime is 61895697467. The next prime is 61895697481. The reversal of 61895697477 is 77479659816.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61895697477 - 2⁷ = 61895697349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61895697467) 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, 8543148 + ... + 8550389.

It is an arithmetic number, because the mean of its divisors is an integer number (5538306312).

Almost surely, 2^61895697477 is an apocalyptic number.

It is an amenable number.

61895697477 is a deficient number, since it is larger than the sum of its proper divisors (26717203515).

61895697477 is a wasteful number, since it uses less digits than its factorization.

61895697477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17093628.

The product of its digits is 160030080, while the sum is 69.

The spelling of 61895697477 in words is "sixty-one billion, eight hundred ninety-five million, six hundred ninety-seven thousand, four hundred seventy-seven".