61400399760 has 160 divisors (see below), whose sum is σ = 241703220480. Its totient is φ = 14034373632.

The previous prime is 61400399743. The next prime is 61400399783. The reversal of 61400399760 is 6799300416.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2015317 + ... + 2045556.

It is an arithmetic number, because the mean of its divisors is an integer number (1510645128).

Almost surely, 2^61400399760 is an apocalyptic number.

61400399760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61400399760 is an abundant number, since it is smaller than the sum of its proper divisors (180302820720).

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

61400399760 is a wasteful number, since it uses less digits than its factorization.

61400399760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060902 (or 4060890 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 61400399760 in words is "sixty-one billion, four hundred million, three hundred ninety-nine thousand, seven hundred sixty".