61777380 has 48 divisors (see below), whose sum is σ = 197688960. Its totient is φ = 14120448.

The previous prime is 61777367. The next prime is 61777393. The reversal of 61777380 is 8377716.

It is an interprime number because it is at equal distance from previous prime (61777367) and next prime (61777393).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73125 + ... + 73964.

It is an arithmetic number, because the mean of its divisors is an integer number (4118520).

Almost surely, 2^61777380 is an apocalyptic number.

61777380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61777380 is an abundant number, since it is smaller than the sum of its proper divisors (135911580).

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

61777380 is a wasteful number, since it uses less digits than its factorization.

61777380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147108 (or 147106 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 39.

The square root of 61777380 is about 7859.8587773573. The cubic root of 61777380 is about 395.3148800442.

The spelling of 61777380 in words is "sixty-one million, seven hundred seventy-seven thousand, three hundred eighty".