61277155502064 has 40 divisors (see below), whose sum is σ = 158301843939792. Its totient is φ = 20425392622080.

The previous prime is 61277155502051. The next prime is 61277155502071. The reversal of 61277155502064 is 46020555177216.

It is a junction number, because it is equal to n+sod(n) for n = 61277155501998 and 61277155502016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7134367 + ... + 13170174.

Almost surely, 2^{61277155502064} is an apocalyptic number.

It is an amenable number.

61277155502064 is an abundant number, since it is smaller than the sum of its proper divisors (97024688437728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61277155502064 is a wasteful number, since it uses less digits than its factorization.

61277155502064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20367425 (or 20367419 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 51.

The spelling of 61277155502064 in words is "sixty-one trillion, two hundred seventy-seven billion, one hundred fifty-five million, five hundred two thousand, sixty-four".