61949265280 has 96 divisors (see below), whose sum is σ = 172276727040. Its totient is φ = 21239737344.

The previous prime is 61949265277. The next prime is 61949265311. The reversal of 61949265280 is 8256294916.

It is a super-2 number, since 2×61949265280² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 956352 + ... + 1019071.

It is an arithmetic number, because the mean of its divisors is an integer number (1794549240).

Almost surely, 2^61949265280 is an apocalyptic number.

It is an amenable number.

61949265280 is an abundant number, since it is smaller than the sum of its proper divisors (110327461760).

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

61949265280 is a wasteful number, since it uses less digits than its factorization.

61949265280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975456 (or 1975437 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 61949265280 in words is "sixty-one billion, nine hundred forty-nine million, two hundred sixty-five thousand, two hundred eighty".