40261156465 has 16 divisors (see below), whose sum is σ = 50863029120. Its totient is φ = 30509619840.

The previous prime is 40261156447. The next prime is 40261156469. The reversal of 40261156465 is 56465116204.

It is not a de Polignac number, because 40261156465 - 2¹³ = 40261148273 is a prime.

It is a super-2 number, since 2×40261156465² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40261156469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 812605 + ... + 860725.

It is an arithmetic number, because the mean of its divisors is an integer number (3178939320).

Almost surely, 2^40261156465 is an apocalyptic number.

It is an amenable number.

40261156465 is a deficient number, since it is larger than the sum of its proper divisors (10601872655).

40261156465 is a wasteful number, since it uses less digits than its factorization.

40261156465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56952.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 40261156465 in words is "forty billion, two hundred sixty-one million, one hundred fifty-six thousand, four hundred sixty-five".