39977357461 has 4 divisors (see below), whose sum is σ = 39982972300. Its totient is φ = 39971742624.

The previous prime is 39977357419. The next prime is 39977357479. The reversal of 39977357461 is 16475377993.

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 27861952561 + 12115404900 = 166919^2 + 110070^2 .

It is a cyclic number.

It is not a de Polignac number, because 39977357461 - 2¹⁹ = 39976833173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39977357461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39977357261) 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, 2796726 + ... + 2810983.

It is an arithmetic number, because the mean of its divisors is an integer number (9995743075).

Almost surely, 2^39977357461 is an apocalyptic number.

It is an amenable number.

39977357461 is a deficient number, since it is larger than the sum of its proper divisors (5614839).

39977357461 is an equidigital number, since it uses as much as digits as its factorization.

39977357461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5614838.

The product of its digits is 30005640, while the sum is 61.

The spelling of 39977357461 in words is "thirty-nine billion, nine hundred seventy-seven million, three hundred fifty-seven thousand, four hundred sixty-one".