61206570617155 has 4 divisors (see below), whose sum is σ = 73447884740592. Its totient is φ = 48965256493720.

The previous prime is 61206570617029. The next prime is 61206570617177. The reversal of 61206570617155 is 55171607560216.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61206570617155 - 2²³ = 61206562228547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6120657061711 + ... + 6120657061720.

It is an arithmetic number, because the mean of its divisors is an integer number (18361971185148).

Almost surely, 2^{61206570617155} is an apocalyptic number.

61206570617155 is a deficient number, since it is larger than the sum of its proper divisors (12241314123437).

61206570617155 is a wasteful number, since it uses less digits than its factorization.

61206570617155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12241314123436.

The product of its (nonzero) digits is 2646000, while the sum is 52.

The spelling of 61206570617155 in words is "sixty-one trillion, two hundred six billion, five hundred seventy million, six hundred seventeen thousand, one hundred fifty-five".