61653145362265 has 32 divisors (see below), whose sum is σ = 78393560361984. Its totient is φ = 46386946529280.

The previous prime is 61653145362233. The next prime is 61653145362269. The reversal of 61653145362265 is 56226354135616.

It is a happy number.

It is not a de Polignac number, because 61653145362265 - 2⁵ = 61653145362233 is a prime.

It is a super-2 number, since 2×61653145362265² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61653145362269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1967407677 + ... + 1967439013.

It is an arithmetic number, because the mean of its divisors is an integer number (2449798761312).

Almost surely, 2^{61653145362265} is an apocalyptic number.

It is an amenable number.

61653145362265 is a deficient number, since it is larger than the sum of its proper divisors (16740414999719).

61653145362265 is a wasteful number, since it uses less digits than its factorization.

61653145362265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47697.

The product of its digits is 23328000, while the sum is 55.

The spelling of 61653145362265 in words is "sixty-one trillion, six hundred fifty-three billion, one hundred forty-five million, three hundred sixty-two thousand, two hundred sixty-five".