49778655416 has 128 divisors (see below), whose sum is σ = 111675801600. Its totient is φ = 20360895360.

The previous prime is 49778655401. The next prime is 49778655431. The reversal of 49778655416 is 61455687794.

It is an interprime number because it is at equal distance from previous prime (49778655401) and next prime (49778655431).

It is a super-2 number, since 2×49778655416² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20341505 + ... + 20343951.

It is an arithmetic number, because the mean of its divisors is an integer number (872467200).

Almost surely, 2^49778655416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49778655416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55837900800).

49778655416 is an abundant number, since it is smaller than the sum of its proper divisors (61897146184).

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

49778655416 is a wasteful number, since it uses less digits than its factorization.

49778655416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697 (or 2693 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 62.

The spelling of 49778655416 in words is "forty-nine billion, seven hundred seventy-eight million, six hundred fifty-five thousand, four hundred sixteen".