16037977397 has 4 divisors (see below), whose sum is σ = 17271667980. Its totient is φ = 14804286816.

The previous prime is 16037977313. The next prime is 16037977409. The reversal of 16037977397 is 79377973061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79377973061 = 17 ⋅4669292533.

It can be written as a sum of positive squares in 2 ways, for example, as 9848379121 + 6189598276 = 99239^2 + 78674^2 .

It is a cyclic number.

It is not a de Polignac number, because 16037977397 - 2¹⁶ = 16037911861 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 (16037977297) 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, 616845272 + ... + 616845297.

It is an arithmetic number, because the mean of its divisors is an integer number (4317916995).

Almost surely, 2^16037977397 is an apocalyptic number.

It is an amenable number.

16037977397 is a deficient number, since it is larger than the sum of its proper divisors (1233690583).

16037977397 is a wasteful number, since it uses less digits than its factorization.

16037977397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233690582.

The product of its (nonzero) digits is 10501974, while the sum is 59.

The spelling of 16037977397 in words is "sixteen billion, thirty-seven million, nine hundred seventy-seven thousand, three hundred ninety-seven".