61377774550153 has 4 divisors (see below), whose sum is σ = 61401463388928. Its totient is φ = 61354085711380.

The previous prime is 61377774550111. The next prime is 61377774550187. The reversal of 61377774550153 is 35105547777316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61377774550153 - 2²⁵ = 61377740995721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61377774550091 and 61377774550100.

It is not an unprimeable number, because it can be changed into a prime (61377774560153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11844415501 + ... + 11844420682.

It is an arithmetic number, because the mean of its divisors is an integer number (15350365847232).

Almost surely, 2^{61377774550153} is an apocalyptic number.

It is an amenable number.

61377774550153 is a deficient number, since it is larger than the sum of its proper divisors (23688838775).

61377774550153 is a wasteful number, since it uses less digits than its factorization.

61377774550153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23688838774.

The product of its (nonzero) digits is 64827000, while the sum is 61.

The spelling of 61377774550153 in words is "sixty-one trillion, three hundred seventy-seven billion, seven hundred seventy-four million, five hundred fifty thousand, one hundred fifty-three".