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40401131461 = 73553440157
BaseRepresentation
bin100101101000000110…
…000101011111000101
310212021121212010102021
4211220012011133011
51130220142201321
630320544243141
72630114644165
oct455006053705
9125247763367
1040401131461
1116152427049
1279b63104b1
133a6b1cbb62
141d539885a5
1510b6d20941
hex9681857c5

40401131461 has 4 divisors (see below), whose sum is σ = 40954571692. Its totient is φ = 39847691232.

The previous prime is 40401131453. The next prime is 40401131467. The reversal of 40401131461 is 16413110404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24733852900 + 15667278561 = 157270^2 + 125169^2 .

It is not a de Polignac number, because 40401131461 - 23 = 40401131453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40401131467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276720006 + ... + 276720151.

It is an arithmetic number, because the mean of its divisors is an integer number (10238642923).

Almost surely, 240401131461 is an apocalyptic number.

It is an amenable number.

40401131461 is a deficient number, since it is larger than the sum of its proper divisors (553440231).

40401131461 is an equidigital number, since it uses as much as digits as its factorization.

40401131461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553440230.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 40401131461 its reverse (16413110404), we get a palindrome (56814241865).

The spelling of 40401131461 in words is "forty billion, four hundred one million, one hundred thirty-one thousand, four hundred sixty-one".

Divisors: 1 73 553440157 40401131461