40780061 has 32 divisors (see below), whose sum is σ = 51744000. Its totient is φ = 31352832.

The previous prime is 40780049. The next prime is 40780073. The reversal of 40780061 is 16008704.

It is an interprime number because it is at equal distance from previous prime (40780049) and next prime (40780073).

It is a de Polignac number, because none of the positive numbers 2^k-40780061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40780061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40780001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374075 + ... + 374183.

It is an arithmetic number, because the mean of its divisors is an integer number (1617000).

Almost surely, 2^40780061 is an apocalyptic number.

It is an amenable number.

40780061 is a deficient number, since it is larger than the sum of its proper divisors (10963939).

40780061 is a wasteful number, since it uses less digits than its factorization.

40780061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 40780061 is about 6385.9267925650. The cubic root of 40780061 is about 344.2040349206.

Adding to 40780061 its reverse (16008704), we get a palindrome (56788765).

The spelling of 40780061 in words is "forty million, seven hundred eighty thousand, sixty-one".