61238849040 has 160 divisors (see below), whose sum is σ = 215839578240. Its totient is φ = 15950559744.

The previous prime is 61238849003. The next prime is 61238849069. The reversal of 61238849040 is 4094883216.

It is a happy number.

61238849040 is a `hidden beast` number, since 61 + 23 + 88 + 490 + 4 + 0 = 666.

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

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, 236787 + ... + 422546.

It is an arithmetic number, because the mean of its divisors is an integer number (1348997364).

Almost surely, 2^61238849040 is an apocalyptic number.

61238849040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61238849040 is an abundant number, since it is smaller than the sum of its proper divisors (154600729200).

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

61238849040 is a wasteful number, since it uses less digits than its factorization.

61238849040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659398 (or 659386 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 61238849040 in words is "sixty-one billion, two hundred thirty-eight million, eight hundred forty-nine thousand, forty".